{"id":74190,"date":"2026-02-09T10:25:24","date_gmt":"2026-02-09T02:25:24","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/74190.html"},"modified":"2026-02-09T10:25:24","modified_gmt":"2026-02-09T02:25:24","slug":"flutter-for-openharmony%ef%bc%9aflutter-%e5%85%a8%e5%b1%8f%e6%bb%91%e5%8a%a8%e5%bc%95%e6%93%8epageview-%e7%bb%84%e4%bb%b6%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/74190.html","title":{"rendered":"Flutter for OpenHarmony\uff1aFlutter \u5168\u5c4f\u6ed1\u52a8\u5f15\u64cePageView \u7ec4\u4ef6\u8be6\u89e3"},"content":{"rendered":"<h2>\u6b22\u8fce\u52a0\u5165\u5f00\u6e90\u9e3f\u8499\u8de8\u5e73\u53f0\u5f00\u53d1\u8005\u793e\u533a<\/h2>\n<p>\u4e00\u8d77\u63a2\u7d22 Flutter &#043; OpenHarmony \u7684\u65e0\u9650\u53ef\u80fd&#xff01; &#x1f449; https:\/\/openharmonycrossplatform.csdn.net<\/p>\n<hr \/>\n<p>\u5728\u79fb\u52a8\u5e94\u7528\u7684\u4ea4\u4e92\u8bbe\u8ba1\u4e2d&#xff0c;\u5982\u679c\u8bf4 ListView \u662f\u201c\u7eb5\u5411\u6d4f\u89c8\u7684\u9ad8\u901f\u516c\u8def\u201d&#xff0c;\u90a3\u4e48 PageView \u5c31\u662f\u201c\u6a2a\u5411\u7ffb\u9875\u7684\u6c89\u6d78\u821e\u53f0\u201d\u3002 \u65e0\u8bba\u662f\u65b0\u624b\u5f15\u5bfc\u9875&#xff08;Onboarding&#xff09;\u3001\u5546\u54c1\u56fe\u7247\u8f6e\u64ad\u3001\u5206\u6b65\u8868\u5355\u3001\u591a\u6807\u7b7e\u5185\u5bb9\u5207\u6362&#xff0c;\u8fd8\u662f\u7535\u5b50\u4e66\u9605\u8bfb\u5668\u3001\u4ea7\u54c1\u753b\u5eca\u3001\u8f66\u673a\u4eea\u8868\u76d8\u5361\u7247\u2014\u2014\u53ea\u8981\u6d89\u53ca\u5168\u5c4f\u6216\u5927\u533a\u57df\u7684\u6a2a\u5411\u6ed1\u52a8\u5207\u6362&#xff0c;PageView \u51e0\u4e4e\u90fd\u662f\u9996\u9009\u65b9\u6848\u3002<\/p>\n<p>\u4f5c\u4e3a Flutter \u6838\u5fc3\u53ef\u6eda\u52a8\u7ec4\u4ef6\u4e4b\u4e00&#xff0c;PageView \u4e0d\u4ec5\u63d0\u4f9b\u4e86\u6d41\u7545\u7684\u624b\u52bf\u6ed1\u52a8\u4f53\u9a8c&#xff0c;\u8fd8\u652f\u6301\u81ea\u5b9a\u4e49\u52a8\u753b\u66f2\u7ebf\u3001\u9875\u9762\u63a7\u5236\u5668\u7cbe\u51c6\u8df3\u8f6c\u3001\u90bb\u8fd1\u9875\u9884\u52a0\u8f7d\u7f13\u5b58\u7b49\u9ad8\u7ea7\u80fd\u529b\u3002\u5c24\u5176\u5728 \u9e3f\u8499&#xff08;OpenHarmony&#xff09;\u591a\u8bbe\u5907\u751f\u6001\u4e0b\u2014\u2014\u4ece 1.3 \u82f1\u5bf8\u667a\u80fd\u624b\u8868\u5230 75 \u82f1\u5bf8\u667a\u6167\u5c4f\u2014\u2014\u7528\u6237\u5bf9\u9875\u9762\u5207\u6362\u7684\u8fde\u8d2f\u6027\u3001\u54cd\u5e94\u901f\u5ea6\u4e0e\u89c6\u89c9\u53cd\u9988\u8981\u6c42\u6781\u9ad8\u3002\u800c PageView \u6b63\u597d\u4ee5\u201c\u6309\u9700\u6784\u5efa\u3001\u9884\u52a0\u8f7d\u7f13\u5b58\u3001\u7269\u7406\u62df\u771f\u201d\u7684\u673a\u5236&#xff0c;\u5b8c\u7f8e\u5951\u5408\u8fd9\u4e00\u9700\u6c42\u3002<\/p>\n<p>&#x1f4a1; \u9e3f\u8499\u89c6\u89d2&#xff1a; \u5728\u5206\u5e03\u5f0f\u573a\u666f\u4e2d&#xff0c;PageView \u7684\u72b6\u6001&#xff08;\u5982\u5f53\u524d\u9875\u7d22\u5f15&#xff09;\u53ef\u8f7b\u677e\u901a\u8fc7 Ability Kit \u6216 Distributed Data Management \u540c\u6b65\u81f3\u5176\u4ed6\u8bbe\u5907&#xff0c;\u5b9e\u73b0\u201c\u624b\u673a\u4e0a\u770b\u5230\u7b2c3\u5f20\u56fe&#xff0c;\u6295\u5c4f\u5230\u667a\u6167\u5c4f\u540e\u81ea\u52a8\u7eed\u64ad\u201d\u7684\u65e0\u7f1d\u4f53\u9a8c\u3002<\/p>\n<p>\u672c\u6587\u5c06\u4ece\u96f6\u5f00\u59cb&#xff0c;\u7cfb\u7edf\u8bb2\u89e3 PageView \u7684\u6838\u5fc3\u7528\u6cd5\u3001\u6027\u80fd\u539f\u7406\u3001\u4ea4\u4e92\u4f18\u5316\u7b56\u7565\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u4e3a\u4ec0\u4e48\u9700\u8981 PageView&#xff1f;\u2014\u2014\u4ece\u201c\u624b\u52a8\u5207\u6362\u201d\u7684\u5c40\u9650\u8bf4\u8d77<\/h3>\n<h4>1. \u771f\u5b9e\u75db\u70b9&#xff1a;\u7528 TabBar &#043; IndexedStack \u5b9e\u73b0\u8f6e\u64ad&#xff1f;<\/h4>\n<p>\u5047\u8bbe\u8981\u5b9e\u73b0\u4e00\u4e2a\u5546\u54c1\u8be6\u60c5\u9875\u7684\u56fe\u7247\u8f6e\u64ad&#xff1a;<\/p>\n<p>int _currentIndex <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Column<\/span><span class=\"token punctuation\">(<\/span><br \/>\n  children<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n    <span class=\"token class-name\">Image<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">network<\/span><span class=\"token punctuation\">(<\/span>images<span class=\"token punctuation\">[<\/span>_currentIndex<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">Row<\/span><span class=\"token punctuation\">(<\/span><br \/>\n      children<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">List<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">generate<\/span><span class=\"token punctuation\">(<\/span>images<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n        <span class=\"token class-name\">GestureDetector<\/span><span class=\"token punctuation\">(<\/span><br \/>\n          onTap<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token function\">setState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> _currentIndex <span class=\"token operator\">&#061;<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n          child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">CircleAvatar<\/span><span class=\"token punctuation\">(<\/span>backgroundColor<span class=\"token punctuation\">:<\/span> _currentIndex <span class=\"token operator\">&#061;&#061;<\/span> i <span class=\"token operator\">?<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>blue <span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>grey<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n      <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u26a0\ufe0f \u95ee\u9898\u66b4\u9732&#xff1a;<\/p>\n<ul>\n<li>\u65e0\u624b\u52bf\u6ed1\u52a8&#xff1a;\u53ea\u80fd\u70b9\u51fb\u5207\u6362&#xff0c;\u64cd\u4f5c\u8def\u5f84\u957f&#xff0c;\u4f53\u9a8c\u5272\u88c2<\/li>\n<li>\u65e0\u52a8\u753b\u8fc7\u6e21&#xff1a;\u5207\u6362\u751f\u786c&#xff0c;\u7f3a\u4e4f\u89c6\u89c9\u8fde\u7eed\u6027<\/li>\n<li>\u65e0\u9884\u52a0\u8f7d&#xff1a;\u5207\u6362\u65f6\u56fe\u7247\u624d\u52a0\u8f7d&#xff0c;\u51fa\u73b0\u767d\u5757\u6216\u95ea\u70c1<\/li>\n<li>\u65e0\u969c\u788d\u652f\u6301\u5f31&#xff1a;\u65e0\u6cd5\u901a\u8fc7\u6ed1\u52a8\u624b\u52bf\u88ab TalkBack \/ VoiceOver \u8bc6\u522b<\/li>\n<\/ul>\n<p>\u5728\u9e3f\u8499\u624b\u8868\u4e0a&#xff0c;\u5c0f\u5c4f\u5e55\u70b9\u51fb\u56f0\u96be&#xff0c;\u8bef\u89e6\u7387\u9ad8&#xff1b;\u5728\u667a\u6167\u5c4f\u4e0a&#xff0c;\u7f3a\u4e4f\u6c89\u6d78\u611f&#xff0c;\u8fdd\u80cc\u300a\u9e3f\u8499\u4eba\u56e0\u8bbe\u8ba1\u6307\u5357\u300b\u4e2d\u201c\u81ea\u7136\u624b\u52bf\u4f18\u5148\u201d\u7684\u539f\u5219\u3002<\/p>\n<h4>2. PageView \u7684\u5b9a\u4f4d&#xff1a;\u5168\u5c4f\u6ed1\u52a8\u5bb9\u5668<\/h4>\n<p>PageView \u662f\u4e13\u4e3a\u9875\u9762\u7ea7\u6a2a\u5411\u6ed1\u52a8\u8bbe\u8ba1\u7684\u7ec4\u4ef6&#xff0c;\u5177\u5907\u4ee5\u4e0b\u4f18\u52bf&#xff1a;<\/p>\n<p>\u2705 \u4e09\u5927\u6838\u5fc3\u80fd\u529b&#xff1a;<\/p>\n<li>\u624b\u52bf\u6ed1\u52a8&#xff1a;\u652f\u6301\u5de6\u53f3\u6ed1\u52a8\u624b\u52bf\u5207\u6362&#xff0c;\u7b26\u5408\u7528\u6237\u76f4\u89c9<\/li>\n<li>\u52a8\u753b\u8fc7\u6e21&#xff1a;\u5185\u7f6e\u5e73\u6ed1\u9875\u9762\u5207\u6362\u52a8\u753b&#xff08;\u53ef\u81ea\u5b9a\u4e49\u66f2\u7ebf&#xff09;<\/li>\n<li>\u61d2\u52a0\u8f7d &#043; \u7f13\u5b58&#xff1a;\u53ea\u6784\u5efa\u5f53\u524d\u9875 &#043; \u90bb\u8fd1\u9875&#xff08;\u9ed8\u8ba4\u7f13\u5b58 1 \u9875&#xff09;&#xff0c;\u5185\u5b58\u9ad8\u6548<\/li>\n<p>&#x1f4a1; \u9e3f\u8499\u4ef7\u503c&#xff1a;<\/p>\n<ul>\n<li>\u8f66\u673a\u7cfb\u7edf&#xff1a;\u7528\u4e8e\u4eea\u8868\u76d8\u591a\u89c6\u56fe\u5207\u6362&#xff08;\u901f\u5ea6\u8868 \u2192 \u5bfc\u822a \u2192 \u5a31\u4e50&#xff09;&#xff0c;\u786e\u4fdd\u9a7e\u9a76\u5b89\u5168<\/li>\n<li>\u667a\u80fd\u624b\u8868&#xff1a;\u7528\u4e8e\u5065\u5eb7\u6570\u636e\u5361\u7247\u8f6e\u64ad&#xff08;\u5fc3\u7387 \u2192 \u8840\u6c27 \u2192 \u7761\u7720&#xff09;&#xff0c;\u8282\u7701\u5c4f\u5e55\u7a7a\u95f4<\/li>\n<li>\u667a\u6167\u5c4f&#xff1a;\u7528\u4e8e\u5bb6\u5ead\u76f8\u518c\u6216\u89c6\u9891\u5c01\u9762\u5899&#xff0c;\u652f\u6301\u9065\u63a7\u5668\u65b9\u5411\u952e\u5207\u6362<\/li>\n<\/ul>\n<p>\u4e00\u5957\u4ee3\u7801&#xff0c;\u591a\u7aef\u9ad8\u6548\u8fd0\u884c&#xff0c;\u771f\u6b63\u8df5\u884c\u201c\u4e00\u6b21\u5f00\u53d1&#xff0c;\u591a\u7aef\u90e8\u7f72\u201d\u7406\u5ff5\u3002<\/p>\n<hr \/>\n<h3>\u4e8c\u3001PageView \u57fa\u7840\u8bed\u6cd5\u4e0e\u6838\u5fc3\u6784\u9020\u65b9\u5f0f<\/h3>\n<h4>1. \u6700\u7b80\u7528\u6cd5&#xff1a;PageView(children: [&#8230;])<\/h4>\n<p>\u9002\u7528\u4e8e\u9875\u9762\u6570\u91cf\u5c11\u4e14\u5df2\u77e5\u7684\u573a\u666f&#xff08;\u5982\u5f15\u5bfc\u9875\u3001\u56fa\u5b9a\u8f6e\u64ad\u3001\u8bbe\u7f6e\u5411\u5bfc&#xff09;\u3002<\/p>\n<p><span class=\"token class-name\">PageView<\/span><span class=\"token punctuation\">(<\/span><br \/>\n  children<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n    <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span>color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>red<span class=\"token punctuation\">,<\/span> child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Center<\/span><span class=\"token punctuation\">(<\/span>child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u7b2c1\u9875&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span>color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>green<span class=\"token punctuation\">,<\/span> child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Center<\/span><span class=\"token punctuation\">(<\/span>child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u7b2c2\u9875&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span>color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>blue<span class=\"token punctuation\">,<\/span> child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Center<\/span><span class=\"token punctuation\">(<\/span>child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u7b2c3\u9875&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u2705 \u7279\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u4ee3\u7801\u76f4\u89c2&#xff0c;\u9002\u5408\u9759\u6001\u9875\u9762<\/li>\n<li>\u6240\u6709\u5b50\u9879\u4e00\u6b21\u6027\u6784\u5efa&#xff08;\u65e0\u61d2\u52a0\u8f7d&#xff09;<\/li>\n<li>\u9875\u9762\u6570 \u2264 5 \u65f6\u63a8\u8350\u4f7f\u7528&#xff08;\u5982 App \u9996\u6b21\u542f\u52a8\u7684 3\u20134 \u9875\u5f15\u5bfc&#xff09;<\/li>\n<\/ul>\n<p>\u26a0\ufe0f \u6ce8\u610f&#xff1a; \u82e5\u9875\u9762\u6570\u8d85\u8fc7 10&#xff0c;\u6216\u5185\u5bb9\u52a8\u6001\u751f\u6210&#xff08;\u5982\u7f51\u7edc\u56fe\u7247\u5217\u8868&#xff09;&#xff0c;\u5e94\u6539\u7528 PageView.builder&#xff0c;\u5426\u5219\u4f1a\u5bfc\u81f4\u5185\u5b58\u6d6a\u8d39\u751a\u81f3\u5361\u987f\u3002<\/p>\n<h4>2. \u9ad8\u6027\u80fd\u5199\u6cd5&#xff1a;PageView.builder&#xff08;\u91cd\u70b9&#xff01;&#xff09;<\/h4>\n<p>\u9002\u7528\u4e8e\u9875\u9762\u6570\u5927\u3001\u52a8\u6001\u751f\u6210\u7684\u573a\u666f&#xff08;\u5982\u65e0\u9650\u8f6e\u64ad\u3001\u957f\u56fe\u6587\u518c\u3001\u5546\u54c1\u753b\u5eca&#xff09;\u3002<\/p>\n<p><span class=\"token class-name\">PageView<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><br \/>\n  itemCount<span class=\"token punctuation\">:<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  itemBuilder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span>context<span class=\"token punctuation\">,<\/span> index<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n      color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>primaries<span class=\"token punctuation\">[<\/span>index <span class=\"token operator\">%<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>primaries<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n      child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Center<\/span><span class=\"token punctuation\">(<\/span>child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u9875\u9762 <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">$<\/span><span class=\"token expression\">index<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u2705 \u6838\u5fc3\u673a\u5236&#xff1a;<\/p>\n<ul>\n<li>itemCount&#xff1a;\u58f0\u660e\u603b\u9875\u6570&#xff08;\u5fc5\u987b\u660e\u786e&#xff0c;\u907f\u514d\u65e0\u9650\u5217\u8868&#xff09;<\/li>\n<li>itemBuilder&#xff1a;\u4ec5\u6784\u5efa\u5f53\u524d\u9875 &#043; \u7f13\u5b58\u9875&#xff08;\u9ed8\u8ba4 cacheExtent \u8986\u76d6 1 \u9875&#xff09;<\/li>\n<li>\u5185\u5b58\u5360\u7528\u6052\u5b9a&#xff08;\u901a\u5e38\u53ea\u7ef4\u62a4 3\u20135 \u4e2a\u9875\u9762\u5b9e\u4f8b&#xff09;<\/li>\n<li>\u81ea\u52a8\u590d\u7528 widget&#xff0c;\u63d0\u5347\u6eda\u52a8\u5e27\u7387<\/li>\n<\/ul>\n<p>&#x1f50d; \u6280\u672f\u7ec6\u8282&#xff1a; PageView \u5185\u90e8\u57fa\u4e8e Scrollable \u548c Viewport \u6784\u5efa&#xff0c;\u5176\u7f13\u5b58\u7b56\u7565\u7531 cacheExtent \u63a7\u5236&#xff08;\u5355\u4f4d&#xff1a;\u903b\u8f91\u50cf\u7d20&#xff09;\u3002\u53ef\u901a\u8fc7 PageController(cacheExtent: 500) \u8c03\u6574\u9884\u52a0\u8f7d\u8303\u56f4\u3002<\/p>\n<hr \/>\n<h3>\u4e09\u3001PageView \u6838\u5fc3\u5c5e\u6027\u8be6\u89e3<\/h3>\n<table>\n<tr>\u5c5e\u6027\u8bf4\u660e\u9ed8\u8ba4\u503c\u9e3f\u8499\u9002\u914d\u5efa\u8bae<\/tr>\n<tbody>\n<tr>\n<td>scrollDirection<\/td>\n<td>\u6ed1\u52a8\u65b9\u5411&#xff08;horizontal\/vertical&#xff09;<\/td>\n<td>Axis.horizontal<\/td>\n<td>\u667a\u6167\u5c4f\u9065\u63a7\u5668\u5bfc\u822a\u5efa\u8bae\u7528 vertical<\/td>\n<\/tr>\n<tr>\n<td>pageSnapping<\/td>\n<td>\u662f\u5426\u5438\u9644\u5230\u6574\u9875&#xff08;\u7981\u6b62\u534a\u9875\u505c\u7559&#xff09;<\/td>\n<td>true<\/td>\n<td>\u52a1\u5fc5\u4fdd\u6301 true&#xff0c;\u786e\u4fdd\u4ea4\u4e92\u786e\u5b9a\u6027<\/td>\n<\/tr>\n<tr>\n<td>physics<\/td>\n<td>\u6eda\u52a8\u7269\u7406\u6548\u679c&#xff08;BouncingScrollPhysics \/ Clamping&#xff09;<\/td>\n<td>\u81ea\u52a8\u9002\u914d\u5e73\u53f0<\/td>\n<td>\u9e3f\u8499\u8bbe\u5907\u7edf\u4e00\u7528 ClampingScrollPhysics()<\/td>\n<\/tr>\n<tr>\n<td>controller<\/td>\n<td>\u9875\u9762\u63a7\u5236\u5668&#xff08;\u63a7\u5236\u8df3\u8f6c\u3001\u76d1\u542c\u4f4d\u7f6e&#xff09;<\/td>\n<td>\u81ea\u52a8\u751f\u6210<\/td>\n<td>\u5fc5\u987b\u624b\u52a8\u7ba1\u7406\u751f\u547d\u5468\u671f<\/td>\n<\/tr>\n<tr>\n<td>onPageChanged<\/td>\n<td>\u9875\u9762\u5207\u6362\u5b8c\u6210\u56de\u8c03&#xff08;\u6574\u6570\u7d22\u5f15&#xff09;<\/td>\n<td>null<\/td>\n<td>\u7528\u4e8e\u57cb\u70b9\u3001\u72b6\u6001\u540c\u6b65<\/td>\n<\/tr>\n<tr>\n<td>padEnds<\/td>\n<td>\u662f\u5426\u5728\u9996\u5c3e\u6dfb\u52a0\u7a7a\u767d&#xff08;\u9632\u8fb9\u7f18\u88c1\u526a&#xff09;<\/td>\n<td>false<\/td>\n<td>\u5927\u5c4f\u8bbe\u5907\u53ef\u8bbe\u4e3a true \u63d0\u5347\u89c6\u89c9\u8212\u9002\u5ea6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&#x1f4cc; \u5173\u952e\u6982\u5ff5\u89e3\u6790&#xff1a;<\/p>\n<h4>1. controller&#xff1a;\u7cbe\u51c6\u63a7\u5236\u9875\u9762\u8df3\u8f6c<\/h4>\n<p><span class=\"token keyword\">final<\/span> _pageController <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">PageController<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8df3\u8f6c\u5230\u7b2c2\u9875&#xff08;\u7d22\u5f151&#xff09;&#xff0c;\u5e26\u52a8\u753b<\/span><br \/>\n_pageController<span class=\"token punctuation\">.<\/span><span class=\"token function\">animateToPage<\/span><span class=\"token punctuation\">(<\/span><br \/>\n  <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  duration<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Duration<\/span><span class=\"token punctuation\">(<\/span>milliseconds<span class=\"token punctuation\">:<\/span> <span class=\"token number\">500<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  curve<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Curves<\/span><span class=\"token punctuation\">.<\/span>easeInOut<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u83b7\u53d6\u5f53\u524d\u9875&#xff08;\u6ce8\u610f&#xff1a;page \u662f double \u7c7b\u578b&#xff09;<\/span><br \/>\nint currentPage <span class=\"token operator\">&#061;<\/span> _pageController<span class=\"token punctuation\">.<\/span>page<span class=\"token operator\">?<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">round<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span><span class=\"token operator\">?<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u2705 \u5e94\u7528\u573a\u666f&#xff1a;<\/p>\n<ul>\n<li>\u5f15\u5bfc\u9875\u81ea\u52a8\u64ad\u653e&#xff08;\u914d\u5408 Timer&#xff09;<\/li>\n<li>\u8f6e\u64ad\u56fe\u5b9a\u65f6\u5207\u6362&#xff08;\u6bcf 3 \u79d2\u81ea\u52a8\u7ffb\u9875&#xff09;<\/li>\n<li>\u5916\u90e8\u6309\u94ae\u63a7\u5236\u7ffb\u9875&#xff08;\u5982\u201c\u4e0a\u4e00\u5f20\/\u4e0b\u4e00\u5f20\u201d&#xff09;<\/li>\n<li>\u9e3f\u8499\u5206\u5e03\u5f0f\u6d41\u8f6c&#xff1a;\u63a5\u6536\u6765\u81ea\u5176\u4ed6\u8bbe\u5907\u7684\u9875\u7801\u6307\u4ee4&#xff0c;\u8c03\u7528 animateToPage \u540c\u6b65\u72b6\u6001<\/li>\n<\/ul>\n<h4>2. reverse&#xff1a;\u53cd\u5411\u6ed1\u52a8<\/h4>\n<p><span class=\"token class-name\">PageView<\/span><span class=\"token punctuation\">(<\/span><br \/>\n  reverse<span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u4ece\u53f3\u5411\u5de6\u6ed1\u52a8<\/span><br \/>\n  children<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u2705 \u9002\u7528\u573a\u666f&#xff1a;<\/p>\n<ul>\n<li>RTL \u8bed\u8a00&#xff08;\u963f\u62c9\u4f2f\u8bed\u3001\u5e0c\u4f2f\u6765\u8bed&#xff09;\u2014\u2014\u9700\u914d\u5408 TextDirection.rtl<\/li>\n<li>\u7279\u6b8a\u4ea4\u4e92\u9700\u6c42&#xff08;\u5982\u65f6\u95f4\u5012\u6d41\u3001\u5386\u53f2\u56de\u6eaf&#xff09;<\/li>\n<li>\u8f66\u673a\u53f3\u8235\u8f66\u578b\u7684 UI \u5e03\u5c40\u9002\u914d<\/li>\n<\/ul>\n<hr \/>\n<h3>\u56db\u3001PageView \u5b8c\u6574\u5b9e\u6218\u793a\u4f8b<\/h3>\n<h4>1. \u89c6\u9891\u8f6e\u8f6cApp<\/h4>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token string-literal\"><span class=\"token string\">&#039;package:flutter\/material.dart&#039;<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">runApp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">MyApp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MyApp<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">StatefulWidget<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token class-name\">MyApp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token class-name\">Key<\/span><span class=\"token operator\">?<\/span> key<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">:<\/span> key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>  <span class=\"token metadata function\">&#064;override<\/span><br \/>\n  _MyAppState <span class=\"token function\">createState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token function\">_MyAppState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> _MyAppState <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">State<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">MyApp<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  int _currentPage <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u5f53\u524d\u9875\u7801<\/span><br \/>\n  <span class=\"token class-name\">PageController<\/span> _pageController <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">PageController<\/span><span class=\"token punctuation\">(<\/span>initialPage<span class=\"token punctuation\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u9875\u9762\u63a7\u5236\u5668<\/span><br \/>\n  <span class=\"token metadata function\">&#064;override<\/span><br \/>\n  <span class=\"token class-name\">Widget<\/span> <span class=\"token function\">build<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BuildContext<\/span> context<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">MaterialApp<\/span><span class=\"token punctuation\">(<\/span><br \/>\n      home<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Scaffold<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        appBar<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">AppBar<\/span><span class=\"token punctuation\">(<\/span><br \/>\n          title<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;PageView\u4ee3\u7801\u793a\u8303&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n         body<span class=\"token punctuation\">:<\/span><span class=\"token class-name\">CustomScrollView<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            slivers<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n              <span class=\"token comment\">\/\/\u5305\u88f9\u666e\u901a\u7ec4\u4ef6\u7684Sliver<\/span><br \/>\n            <span class=\"token class-name\">SliverToBoxAdapter<\/span><span class=\"token punctuation\">(<\/span><br \/>\n              child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Stack<\/span><span class=\"token punctuation\">(<\/span><br \/>\n               children<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n                <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                alignment<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Alignment<\/span><span class=\"token punctuation\">.<\/span>center<span class=\"token punctuation\">,<\/span><br \/>\n                height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                child<span class=\"token punctuation\">:<\/span><span class=\"token class-name\">PageView<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                  controller<span class=\"token punctuation\">:<\/span> _pageController<span class=\"token punctuation\">,<\/span><br \/>\n                  itemCount<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                  itemBuilder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BuildContext<\/span> context<span class=\"token punctuation\">,<\/span> int index<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                      height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                      color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>pink<span class=\"token punctuation\">,<\/span><br \/>\n                      child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u89c6\u9891<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">${<\/span><span class=\"token expression\">index<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span><br \/>\n                              style<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">TextStyle<\/span><span class=\"token punctuation\">(<\/span>color<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token class-name\">Color<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">fromARGB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>fontSize<span class=\"token punctuation\">:<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                     alignment<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Alignment<\/span><span class=\"token punctuation\">.<\/span>center<span class=\"token punctuation\">,<\/span><br \/>\n                    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n             <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n             <span class=\"token class-name\">Positioned<\/span><span class=\"token punctuation\">(<\/span><br \/>\n              bottom<span class=\"token punctuation\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              right<span class=\"token punctuation\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              left<span class=\"token punctuation\">:<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n              height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">40<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Row<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                mainAxisAlignment<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">MainAxisAlignment<\/span><span class=\"token punctuation\">.<\/span>center<span class=\"token punctuation\">,<\/span><br \/>\n                children<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">List<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">generate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>index<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                  <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">GestureDetector<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                    onTap<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                      <span class=\"token comment\">\/\/\u70b9\u51fb\u5206\u9875\u5668\u65f6&#xff0c;\u66f4\u65b0\u5f53\u524d\u9875\u7801\u548c\u8df3\u8f6c\u5230\u6307\u5b9a\u9875\u7801<\/span><br \/>\n                      <span class=\"token comment\">\/\/ _pageController.jumpToPage(index);<\/span><br \/>\n                        _pageController<span class=\"token punctuation\">.<\/span><span class=\"token function\">animateToPage<\/span><span class=\"token punctuation\">(<\/span>index<span class=\"token punctuation\">,<\/span><br \/>\n                        duration<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Duration<\/span><span class=\"token punctuation\">(<\/span>milliseconds<span class=\"token punctuation\">:<\/span> <span class=\"token number\">300<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                        curve<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Curves<\/span><span class=\"token punctuation\">.<\/span>ease<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6eda\u52a8\u5230\u6307\u5b9a\u9875\u7801&#xff0c;\u52a8\u753b\u6548\u679c<\/span><br \/>\n                      <span class=\"token function\">setState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                        _currentPage <span class=\"token operator\">&#061;<\/span> index<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u66f4\u65b0\u5f53\u524d\u9875\u7801<\/span><br \/>\n                      <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                     child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                    margin<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">EdgeInsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">only<\/span><span class=\"token punctuation\">(<\/span>left<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    width<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    decoration<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">BoxDecoration<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                      color<span class=\"token punctuation\">:<\/span> _currentPage <span class=\"token operator\">&#061;&#061;<\/span> index <span class=\"token operator\">?<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>blue<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>white<span class=\"token punctuation\">,<\/span><br \/>\n                      borderRadius<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">BorderRadius<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">circular<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                  <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                  <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n             <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">]<\/span><br \/>\n            <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">SliverToBoxAdapter<\/span><span class=\"token punctuation\">(<\/span>child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">SizedBox<\/span><span class=\"token punctuation\">(<\/span>height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u89c6\u9891\u548c\u5206\u7c7b\u4e4b\u95f4\u7684\u95f4\u8ddd<\/span><\/p>\n<p>            <span class=\"token class-name\">SliverPersistentHeader<\/span><span class=\"token punctuation\">(<\/span>delegate<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">MySliverPersistentHeaderDelegate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> pinned<span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5206\u7c7b\u6807\u9898<\/span><\/p>\n<p>            <span class=\"token class-name\">SliverToBoxAdapter<\/span><span class=\"token punctuation\">(<\/span>child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">SizedBox<\/span><span class=\"token punctuation\">(<\/span>height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5206\u7c7b\u548c\u5217\u8868\u4e4b\u95f4\u7684\u95f4\u8ddd<\/span><\/p>\n<p>            <span class=\"token class-name\">SliverList<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">separated<\/span><span class=\"token punctuation\">(<\/span><br \/>\n              itemCount<span class=\"token punctuation\">:<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              itemBuilder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BuildContext<\/span> context<span class=\"token punctuation\">,<\/span> int index<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                  height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                  color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>white<span class=\"token punctuation\">,<\/span><br \/>\n                  child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u5217\u8868<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">${<\/span><span class=\"token expression\">index<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span><br \/>\n                          style<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">TextStyle<\/span><span class=\"token punctuation\">(<\/span>color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>blue<span class=\"token punctuation\">,<\/span>fontSize<span class=\"token punctuation\">:<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                 alignment<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Alignment<\/span><span class=\"token punctuation\">.<\/span>center<span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n              <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              separatorBuilder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BuildContext<\/span> context<span class=\"token punctuation\">,<\/span> int index<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                margin<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">EdgeInsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">only<\/span><span class=\"token punctuation\">(<\/span>top<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                width<span class=\"token punctuation\">:<\/span> double<span class=\"token punctuation\">.<\/span>infinity<span class=\"token punctuation\">,<\/span><br \/>\n                height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>grey<span class=\"token punctuation\">[<\/span><span class=\"token number\">200<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n              <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n         <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n      <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MySliverPersistentHeaderDelegate<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">SliverPersistentHeaderDelegate<\/span><span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token metadata function\">&#064;override<\/span><br \/>\n  <span class=\"token class-name\">Widget<\/span> <span class=\"token function\">build<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BuildContext<\/span> context<span class=\"token punctuation\">,<\/span> double shrinkOffset<span class=\"token punctuation\">,<\/span> bool overlapsContent<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n     color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>white<span class=\"token punctuation\">,<\/span><br \/>\n     child<span class=\"token punctuation\">:<\/span><span class=\"token class-name\">ListView<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><br \/>\n      scrollDirection<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Axis<\/span><span class=\"token punctuation\">.<\/span>horizontal<span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u6c34\u5e73\u6eda\u52a8<\/span><br \/>\n      itemCount<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5206\u7c7b\u7684\u6570\u91cf<\/span><br \/>\n      itemBuilder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BuildContext<\/span> context<span class=\"token punctuation\">,<\/span>int index<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">Container<\/span><span class=\"token punctuation\">(<\/span><br \/>\n          width<span class=\"token punctuation\">:<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><br \/>\n          margin<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">EdgeInsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">symmetric<\/span><span class=\"token punctuation\">(<\/span>horizontal<span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token comment\">\/\/\u5206\u7c7b\u4e4b\u95f4\u7684\u95f4\u8ddd<\/span><br \/>\n          color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>grey<span class=\"token punctuation\">[<\/span><span class=\"token number\">200<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n          child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u5206\u7c7b<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">${<\/span><span class=\"token expression\">index<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span><br \/>\n                  style<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">TextStyle<\/span><span class=\"token punctuation\">(<\/span>color<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Colors<\/span><span class=\"token punctuation\">.<\/span>black<span class=\"token punctuation\">,<\/span>fontSize<span class=\"token punctuation\">:<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n         alignment<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Alignment<\/span><span class=\"token punctuation\">.<\/span>center<span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n     <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n  <span class=\"token metadata function\">&#064;override<\/span><br \/>\n  double <span class=\"token keyword\">get<\/span> maxExtent <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token number\">80<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6700\u5927\u5c55\u5f00\u9ad8\u5ea6<\/span><br \/>\n  <span class=\"token metadata function\">&#064;override<\/span><br \/>\n  double <span class=\"token keyword\">get<\/span> minExtent <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token number\">40<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/\u6700\u5c0f\u6298\u53e0\u9ad8\u5ea6<\/span><br \/>\n  <span class=\"token metadata function\">&#064;override<\/span><br \/>\n  bool <span class=\"token function\">shouldRebuild<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">covariant<\/span> <span class=\"token class-name\">SliverPersistentHeaderDelegate<\/span> oldDelegate<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260209022522-698945926d8e6.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260209022522-6989459286946.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260209022522-6989459295a96.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260209022522-69894592ab513.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260209022522-69894592b8efd.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>&#x1f4dd; \u67b6\u6784\u4eae\u70b9\u5206\u6790&#xff1a;<\/p>\n<li>\u5d4c\u5957\u6eda\u52a8\u534f\u540c&#xff1a;PageView \u88ab\u5305\u88f9\u5728 CustomScrollView \u7684 SliverToBoxAdapter \u4e2d&#xff0c;\u4e0e\u4e0b\u65b9\u7684 SliverList \u5171\u4eab\u6eda\u52a8\u57df&#xff0c;\u5b9e\u73b0\u201c\u6574\u4f53\u6eda\u52a8 &#043; \u5c40\u90e8\u8f6e\u64ad\u201d\u7684\u590d\u5408\u4f53\u9a8c\u3002<\/li>\n<li>\u5206\u9875\u6307\u793a\u5668\u8054\u52a8&#xff1a;\u901a\u8fc7 _currentPage \u72b6\u6001\u9a71\u52a8\u5e95\u90e8\u5c0f\u5706\u70b9\u989c\u8272\u53d8\u5316&#xff0c;\u70b9\u51fb\u53ef\u89e6\u53d1 animateToPage&#xff0c;\u5b9e\u73b0\u53cc\u5411\u63a7\u5236\u3002<\/li>\n<li>\u9e3f\u8499\u517c\u5bb9\u6027&#xff1a;\u6b64\u7ed3\u6784\u5728\u624b\u8868\u4e0a\u53ef\u7b80\u5316\u4e3a 3 \u9875\u8f6e\u64ad&#xff0c;\u5728\u667a\u6167\u5c4f\u4e0a\u53ef\u6269\u5c55\u4e3a 6 \u9875&#xff0c;\u53ea\u9700\u52a8\u6001\u8c03\u6574 itemCount \u548c Container \u9ad8\u5ea6\u3002<\/li>\n<li>\u6027\u80fd\u4fdd\u969c&#xff1a;\u4f7f\u7528 PageView.builder \u800c\u975e children&#xff0c;\u786e\u4fdd\u5373\u4f7f\u6709 100 \u4e2a\u89c6\u9891\u5c01\u9762&#xff0c;\u5185\u5b58\u4e5f\u4ec5\u7ef4\u6301 3\u20135 \u4e2a\u5b9e\u4f8b\u3002<\/li>\n<hr \/>\n<h3>\u4e94\u3001\u6027\u80fd\u4e0e\u4f53\u9a8c\u4f18\u5316<\/h3>\n<h4>1. \u4f7f\u7528 const \u51cf\u5c11 rebuild<\/h4>\n<p>itemBuilder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span>context<span class=\"token punctuation\">,<\/span> index<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token class-name\">StaticPage<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u2705<\/span><\/p>\n<p>\u2705 \u6548\u679c&#xff1a;<\/p>\n<ul>\n<li>\u51cf\u5c11 widget \u521b\u5efa\u5f00\u9500<\/li>\n<li>\u63d0\u5347\u6eda\u52a8\u5e27\u7387 5\u201315%<\/li>\n<li>\u964d\u4f4e GC \u9891\u7387&#xff0c;\u5ef6\u957f\u8bbe\u5907\u7eed\u822a<\/li>\n<\/ul>\n<h4>2. \u907f\u514d\u590d\u6742\u52a8\u753b<\/h4>\n<p>\u26a0\ufe0f \u8b66\u544a&#xff1a; \u5728 PageView \u7684\u9875\u9762\u4e2d\u4f7f\u7528 AnimatedContainer \u6216 AnimationController&#xff0c; \u4f1a\u5bfc\u81f4\u6ed1\u52a8\u65f6\u5927\u91cf\u52a8\u753b\u540c\u65f6\u6267\u884c&#xff0c;\u4e25\u91cd\u6389\u5e27&#xff08;\u5c24\u5176\u5728\u4f4e\u7aef\u9e3f\u8499\u8bbe\u5907\u4e0a&#xff09;\u3002<\/p>\n<p>\u2705 \u66ff\u4ee3\u65b9\u6848&#xff1a;<\/p>\n<ul>\n<li>\u9875\u9762\u5207\u6362\u5b8c\u6210\u540e\u518d\u542f\u52a8\u52a8\u753b&#xff08;\u76d1\u542c onPageChanged&#xff09;<\/li>\n<li>\u4f7f\u7528\u8f7b\u91cf\u7ea7 FadeTransition \u5b9e\u73b0\u6de1\u5165\u6548\u679c<\/li>\n<li>\u5bf9\u4e8e\u56fe\u7247&#xff0c;\u4f7f\u7528 CachedNetworkImage &#043; \u5360\u4f4d\u56fe&#xff0c;\u907f\u514d\u52a0\u8f7d\u95ea\u70c1<\/li>\n<\/ul>\n<h4>3. \u56fe\u7247\u9884\u52a0\u8f7d\u4e0e\u7f13\u5b58&#xff08;\u9e3f\u8499\u91cd\u70b9&#xff09;<\/h4>\n<p>itemBuilder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span>context<span class=\"token punctuation\">,<\/span> index<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">CachedNetworkImage<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    imageUrl<span class=\"token punctuation\">:<\/span> videoThumbnails<span class=\"token punctuation\">[<\/span>index<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    placeholder<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> url<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token class-name\">ShimmerEffect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u9aa8\u67b6\u5c4f<\/span><br \/>\n    errorWidget<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">(<\/span>ctx<span class=\"token punctuation\">,<\/span> url<span class=\"token punctuation\">,<\/span> err<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token class-name\">Icon<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Icons<\/span><span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    fit<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">BoxFit<\/span><span class=\"token punctuation\">.<\/span>cover<span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>&#x1f4a1; \u9e3f\u8499\u5efa\u8bae&#xff1a; \u5728\u624b\u8868\u6216\u4f4e\u7f51\u901f\u8bbe\u5907\u4e0a&#xff0c;\u53ef\u9884\u52a0\u8f7d\u524d 3 \u5f20\u7f29\u7565\u56fe&#xff1b;\u5728\u667a\u6167\u5c4f\u4e0a&#xff0c;\u53ef\u52a0\u8f7d\u9ad8\u6e05\u56fe\u3002 \u53ef\u901a\u8fc7 MediaQuery.of(context).size \u52a8\u6001\u9009\u62e9\u56fe\u7247\u5206\u8fa8\u7387\u3002<\/p>\n<hr \/>\n<h3>\u516d\u3001\u5e38\u89c1\u8bef\u533a\u4e0e\u9677\u9631<\/h3>\n<h4>\u274c \u8bef\u533a1&#xff1a;\u5728 Column \u4e2d\u5d4c\u5957 PageView<\/h4>\n<p><span class=\"token class-name\">Column<\/span><span class=\"token punctuation\">(<\/span><br \/>\n  children<span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n    <span class=\"token class-name\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal\"><span class=\"token string\">&#034;\u6807\u9898&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token class-name\">PageView<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u274c \u62a5\u9519&#xff01;<\/span><br \/>\n  <span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>&#x1f6a8; \u9519\u8bef\u4fe1\u606f&#xff1a; Horizontal viewport was given unbounded width &#xff08;\u6c34\u5e73\u89c6\u53e3\u88ab\u8d4b\u4e88\u4e86\u65e0\u9650\u5bbd\u5ea6&#xff09;<\/p>\n<p>\u2705 \u89e3\u51b3\u65b9\u6848&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u65b9\u68481&#xff1a;\u4f7f\u7528 Expanded&#xff08;\u63a8\u8350&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Expanded<\/span><span class=\"token punctuation\">(<\/span>child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">PageView<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u65b9\u68482&#xff1a;\u8bbe\u7f6e\u56fa\u5b9a\u5c3a\u5bf8<\/span><br \/>\n<span class=\"token class-name\">SizedBox<\/span><span class=\"token punctuation\">(<\/span>height<span class=\"token punctuation\">:<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> width<span class=\"token punctuation\">:<\/span> double<span class=\"token punctuation\">.<\/span>infinity<span class=\"token punctuation\">,<\/span> child<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">PageView<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>&#x1f50d; \u539f\u7406&#xff1a; Column \u4e0d\u4f1a\u9650\u5236\u5b50\u9879\u5bbd\u5ea6&#xff0c;\u5bfc\u81f4 PageView \u65e0\u6cd5\u8ba1\u7b97 viewport \u5c3a\u5bf8\u3002 Expanded \u4f1a\u5f3a\u5236\u5176\u586b\u5145\u5269\u4f59\u7a7a\u95f4&#xff0c;\u63d0\u4f9b\u660e\u786e\u8fb9\u754c\u3002<\/p>\n<h4>\u274c \u8bef\u533a2&#xff1a;\u5fd8\u8bb0 dispose \u63a7\u5236\u5668<\/h4>\n<p><span class=\"token comment\">\/\/ \u274c \u672a dispose<\/span><br \/>\n<span class=\"token keyword\">final<\/span> _controller <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">PageController<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#x1f6a8; \u540e\u679c&#xff1a;<\/p>\n<ul>\n<li>\u5185\u5b58\u6cc4\u6f0f&#xff08;Controller \u6301\u6709\u9875\u9762\u5f15\u7528&#xff09;<\/li>\n<li>\u9875\u9762\u65e0\u6cd5\u91ca\u653e&#xff0c;\u5bfc\u81f4 OOM<\/li>\n<li>\u5728\u9e3f\u8499\u8bbe\u5907\u4e0a\u52a0\u901f\u7535\u6c60\u6d88\u8017<\/li>\n<\/ul>\n<p>\u2705 \u6b63\u786e\u505a\u6cd5&#xff1a;<\/p>\n<p><span class=\"token metadata function\">&#064;override<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  _pageController<span class=\"token punctuation\">.<\/span><span class=\"token function\">dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u91ca\u653e\u8d44\u6e90<\/span><br \/>\n  <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u2705 \u6700\u4f73\u5b9e\u8df5&#xff1a; \u5c06 PageController \u58f0\u660e\u5728 State \u4e2d&#xff0c;\u5e76\u5728 dispose \u4e2d\u6e05\u7406&#xff0c;\u8fd9\u662f Flutter \u5b98\u65b9\u63a8\u8350\u6a21\u5f0f\u3002<\/p>\n<hr \/>\n<h3>\u4e03\u3001PageView \u4e0e\u5176\u4ed6\u7ec4\u4ef6\u5bf9\u6bd4<\/h3>\n<table>\n<tr>\u7ec4\u4ef6\u4f18\u70b9\u7f3a\u70b9\u9002\u7528\u573a\u666f<\/tr>\n<tbody>\n<tr>\n<td>PageView<\/td>\n<td>\u5168\u5c4f\u6ed1\u52a8\u3001\u624b\u52bf\u6d41\u7545\u3001\u52a8\u753b\u81ea\u7136\u3001\u652f\u6301\u5782\u76f4\/\u6c34\u5e73<\/td>\n<td>\u4ec5\u9650\u6574\u9875\u5207\u6362&#xff0c;\u65e0\u6cd5\u5c40\u90e8\u6eda\u52a8<\/td>\n<td>\u5f15\u5bfc\u9875\u3001\u8f6e\u64ad\u3001\u5361\u7247\u3001\u4eea\u8868\u76d8<\/td>\n<\/tr>\n<tr>\n<td>TabBarView<\/td>\n<td>\u4e0e TabBar \u8054\u52a8&#xff0c;\u8bed\u4e49\u6e05\u6670<\/td>\n<td>\u9700\u914d\u5408 AppBar&#xff0c;\u5e03\u5c40\u56fa\u5b9a&#xff0c;\u4e0d\u591f\u7075\u6d3b<\/td>\n<td>\u8bbe\u7f6e\u5206\u7c7b\u3001\u5185\u5bb9\u6807\u7b7e&#xff08;\u5982\u201c\u5168\u90e8\/\u5df2\u8bfb\/\u8349\u7a3f\u201d&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>ListView<\/td>\n<td>\u7eb5\u5411\u9ad8\u6548&#xff0c;\u652f\u6301\u590d\u6742 item<\/td>\n<td>\u65e0\u6574\u9875\u5438\u9644&#xff0c;\u4e0d\u9002\u5408\u5927\u533a\u57df\u5207\u6362<\/td>\n<td>\u5217\u8868\u3001\u6d88\u606f\u6d41\u3001\u8bc4\u8bba\u533a<\/td>\n<\/tr>\n<tr>\n<td>AnimatedSwitcher<\/td>\n<td>\u8f7b\u91cf\u5207\u6362&#xff0c;\u4ee3\u7801\u7b80\u6d01<\/td>\n<td>\u65e0\u624b\u52bf\u6ed1\u52a8&#xff0c;\u4ec5\u652f\u6301\u4e24\u4e2a\u5b50\u9879\u4ea4\u66ff<\/td>\n<td>\u7b80\u5355\u89c6\u56fe\u5207\u6362&#xff08;\u5982\u767b\u5f55\/\u6ce8\u518c&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u2705 \u7ed3\u8bba&#xff1a;<\/p>\n<ul>\n<li>\u9700\u8981\u624b\u52bf\u6ed1\u52a8 &#043; \u6574\u9875\u5207\u6362 \u2192 \u9009 PageView<\/li>\n<li>\u9700\u8981 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