{"id":63526,"date":"2026-01-22T01:25:04","date_gmt":"2026-01-21T17:25:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/63526.html"},"modified":"2026-01-22T01:25:04","modified_gmt":"2026-01-21T17:25:04","slug":"flutter-for-harmonyos-%e5%89%8d%e7%bd%ae%e7%9f%a5%e8%af%86%ef%bc%9adart%e8%af%ad%e8%a8%80%e8%af%a6%e8%a7%a3%ef%bc%88%e4%b8%8a%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/63526.html","title":{"rendered":"Flutter for HarmonyOS \u524d\u7f6e\u77e5\u8bc6\uff1aDart\u8bed\u8a00\u8be6\u89e3\uff08\u4e0a\uff09"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172500-69710becb6330.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u4e2a\u4eba\u4e3b\u9875&#xff1a;ujainu<\/p>\n<h2>\u5f15\u8a00<\/h2>\n<p>\u5982\u679c\u4f60\u65e2\u5173\u6ce8Flutter\u7684\u8de8\u5e73\u53f0\u7075\u52a8&#xff0c;\u4e5f\u597d\u5947HarmonyOS\u7684\u5168\u573a\u666f\u751f\u6001&#xff0c;\u90a3Dart\u5c31\u662f\u4f60\u6253\u901a\u8fd9\u4e24\u5927\u6280\u672f\u4f53\u7cfb\u7684\u2018\u901a\u7528\u94a5\u5319\u2019\u3002\u8fd9\u95e8\u7531\u8c37\u6b4c\u6253\u9020\u7684\u8bed\u8a00&#xff0c;\u65e2\u5728Flutter\u91cc\u627f\u62c5\u7740\u4eceUI\u6e32\u67d3\u5230\u4e1a\u52a1\u903b\u8f91\u7684\u6838\u5fc3\u89d2\u8272&#xff0c;\u53c8\u51ed\u501f\u9759\u6001\u7c7b\u578b\u3001AOT\u7f16\u8bd1\u7b49\u7279\u6027&#xff0c;\u5b8c\u7f8e\u9002\u914dHarmonyOS\u5bf9\u6027\u80fd\u548c\u591a\u8bbe\u5907\u534f\u540c\u7684\u8981\u6c42\u3002\u4eca\u5929\u6211\u4eec\u5c31\u4ece\u6700\u57fa\u7840\u7684\u8bed\u6cd5\u5f00\u59cb\u62c6\u89e3&#xff0c;\u5e2e\u4f60\u5feb\u901f\u5efa\u7acbDart\u7684\u77e5\u8bc6\u6846\u67b6&#xff0c;\u4e3a\u540e\u7eed\u6df1\u5165\u4e24\u5927\u5e73\u53f0\u5f00\u53d1\u7b51\u7262\u6839\u57fa\u3002\u201d<\/p>\n<h3>1.\u73af\u5883\u9700\u8981<\/h3>\n<p>\u4e3a\u9002\u914d\u540e\u7eed Flutter &#043; HarmonyOS \u96c6\u6210&#xff0c;Windows \u7cfb\u7edf\u4ec5\u9700\u5b8c\u6210\u4ee5\u4e0b\u914d\u7f6e&#xff1a;<\/p>\n<h4>\u914d\u7f6e Dart SDK<\/h4>\n<p>1.\u5b98\u7f51\u4e0b\u8f7d Windows \u7248 Dart SDK&#xff08;zip \u683c\u5f0f&#xff09;&#xff0c;\u89e3\u538b\u81f3 D:\\\\dart-sdk<\/p>\n<p>2.\u7cfb\u7edf\u73af\u5883\u53d8\u91cf\u300cPath\u300d\u65b0\u589e D:\\\\dart-sdk\\\\bin&#xff08;\u4f60\u7684\u5b58\u653e\u8def\u5f84&#xff09;&#xff1b;<\/p>\n<p>3.\u67e5\u770b\u5b89\u88c5\u6210\u679c&#xff1a;\u7ec8\u7aef\u6267\u884c dart &#8211;version&#xff0c;\u8f93\u51fa\u7248\u672c\u53f7\u5373\u6210\u529f\u3002<\/p>\n<p>dart &#8211;version<\/p>\n<h3>2.\u5b89\u88c5 Trae \u5de5\u5177<\/h3>\n<p>1.\u4e0b\u8f7d Windows \u7248 Trae \u5e76\u5b89\u88c5&#xff08;\u8def\u5f84\u907f\u4e2d\u6587 \/ \u7a7a\u683c&#xff09;\u8bbf\u95ee &#xff1a;<\/p>\n<p>https:\/\/www.trae.cn<\/p>\n<p>\u5728 Trae \u63d2\u4ef6\u5e02\u573a\u641c\u300cDart\u300d\u5b89\u88c5\u63d2\u4ef6&#xff0c;\u91cd\u542f\u751f\u6548\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172501-69710bed8fb29.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>3. \u53d8\u91cf\u548c\u5e38\u91cf\u58f0\u660e<\/h3>\n<h4>3.1\u53d8\u91cf\u58f0\u660e&#xff08;var&#xff09;<\/h4>\n<p>var \u81ea\u52a8\u63a8\u5bfc\u53d8\u91cf\u7c7b\u578b&#xff0c;\u58f0\u660e\u540e\u53ef\u4fee\u6539\u503c&#xff0c;\u4f46\u7c7b\u578b\u56fa\u5b9a&#xff1a;<\/p>\n<p>void main() {<br \/>\n  \/\/ \u58f0\u660e\u5e76\u521d\u59cb\u5316&#xff0c;\u81ea\u52a8\u63a8\u5bfc\u4e3aString\u7c7b\u578b<br \/>\n  var platform &#061; &#034;HarmonyOS&#034;;<br \/>\n  \/\/ \u53ef\u4fee\u6539\u503c&#xff08;\u540c\u7c7b\u578b&#xff09;<br \/>\n  platform &#061; &#034;Flutter &#043; HarmonyOS&#034;;<\/p>\n<p>  var version &#061; 4.2; \/\/ \u81ea\u52a8\u63a8\u5bfc\u4e3adouble\u7c7b\u578b<br \/>\n  \/\/ \u9519\u8bef&#xff1a;\u7c7b\u578b\u56fa\u5b9a&#xff0c;\u4e0d\u80fd\u8d4b\u503c\u5b57\u7b26\u4e32<br \/>\n  \/\/ version &#061; &#034;4.2&#034;;<br \/>\n}<\/p>\n<h4>3.2 \u5e38\u91cf\u58f0\u660e<\/h4>\n<p>&#xff08;1&#xff09;final&#xff1a;\u8fd0\u884c\u65f6\u5e38\u91cf \u503c\u521d\u59cb\u5316\u540e\u4e0d\u53ef\u6539&#xff0c;\u9002\u7528\u4e8e\u9e3f\u8499\u8bbe\u5907\u53c2\u6570\u3001Flutter \u56fa\u5b9a\u914d\u7f6e&#xff08;\u8fd0\u884c\u65f6\u786e\u5b9a\u7684\u503c&#xff09;&#xff1a;<\/p>\n<p>\/\/ \u9e3f\u8499\u8bbe\u5907\u578b\u53f7&#xff08;\u8fd0\u884c\u65f6\u83b7\u53d6&#xff0c;\u4e0d\u53ef\u6539&#xff09;<br \/>\nfinal String deviceModel &#061; &#034;HarmonyOS Phone&#034;;<br \/>\n\/\/ \u9519\u8bef&#xff1a;final\u5e38\u91cf\u4e0d\u53ef\u91cd\u65b0\u8d4b\u503c<br \/>\n\/\/ deviceModel &#061; &#034;Tablet&#034;;<\/p>\n<p>&#xff08;2&#xff09;const&#xff1a;\u7f16\u8bd1\u65f6\u5e38\u91cf \u503c\u7f16\u8bd1\u65f6\u786e\u5b9a&#xff0c;\u9002\u7528\u4e8e\u56fa\u5b9a\u5e38\u91cf&#xff08;\u5982\u7248\u672c\u53f7\u3001\u9002\u914d\u6807\u8bc6&#xff09;&#xff0c;\u6027\u80fd\u4f18\u4e8e final&#xff1a;<\/p>\n<p>\/\/ Flutter &#043; \u9e3f\u8499\u9002\u914d\u6807\u8bc6&#xff08;\u7f16\u8bd1\u65f6\u786e\u5b9a&#xff09;<br \/>\nconst int dartVersion &#061; 3;<br \/>\nconst bool isHarmonyAdapt &#061; true;<br \/>\n\/\/ \u9519\u8bef&#xff1a;const\u9700\u7f16\u8bd1\u65f6\u786e\u5b9a\u503c&#xff0c;\u4e0d\u53ef\u7528\u53d8\u91cf\u8d4b\u503c<br \/>\n\/\/ const String temp &#061; platform;<\/p>\n<h3>4. \u5b57\u7b26\u4e32\u3001\u5e03\u5c14\u3001\u6570\u5b57\u7c7b\u578b<\/h3>\n<h4>4.1 \u6570\u5b57\u7c7b\u578b&#xff08;int\/double\/num&#xff09;<\/h4>\n<p>num \u662f int \u548c double \u7684\u7236\u7c7b\u578b&#xff0c;\u4e09\u8005\u7684\u8f6c\u6362\u662f Dart \u6570\u5b57\u5904\u7406\u7684\u6838\u5fc3&#xff0c;\u5f00\u53d1\u4e2d\u5e38\u7528\u4e8e\u5c3a\u5bf8\u8ba1\u7b97\u3001\u6570\u636e\u683c\u5f0f\u5316\u7b49\u573a\u666f&#xff1a;<\/p>\n<p>void main() {<br \/>\n  \/\/ 1. \u57fa\u7840\u58f0\u660e<br \/>\n  int a &#061; 10;        \/\/ \u6574\u6570<br \/>\n  double b &#061; 20.5;   \/\/ \u6d6e\u70b9\u6570<br \/>\n  num c &#061; 30;        \/\/ num\u53ef\u63a5\u6536int\/double\u7c7b\u578b\u503c<br \/>\n  num d &#061; 40.8;<\/p>\n<p>  \/\/ 2. \u6838\u5fc3\u8f6c\u6362<br \/>\n  \/\/ int \u2192 double&#xff08;\u76f4\u63a5\u8c03\u7528toDouble()&#xff09;<br \/>\n  double aToDouble &#061; a.toDouble(); \/\/ \u7ed3\u679c&#xff1a;10.0<\/p>\n<p>  \/\/ double \u2192 int&#xff08;\u4e24\u79cd\u5e38\u7528\u65b9\u5f0f&#xff09;<br \/>\n  int bToInt1 &#061; b.toInt();        \/\/ \u76f4\u63a5\u622a\u65ad\u5c0f\u6570&#xff0c;\u7ed3\u679c&#xff1a;20<br \/>\n  int bToInt2 &#061; b.round();        \/\/ \u56db\u820d\u4e94\u5165&#xff0c;\u7ed3\u679c&#xff1a;21<\/p>\n<p>  \/\/ num \u2192 int\/double&#xff08;\u9700\u5148\u5224\u65ad\u7c7b\u578b&#xff0c;\u907f\u514d\u62a5\u9519&#xff09;<br \/>\n  int cToInt &#061; c.toInt();         \/\/ num(30)\u2192int&#xff0c;\u7ed3\u679c&#xff1a;30<br \/>\n  double dToDouble &#061; d.toDouble();\/\/ num(40.8)\u2192double&#xff0c;\u7ed3\u679c&#xff1a;40.8<br \/>\n}<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172501-69710bedef15a.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h4>4.2 \u5e03\u5c14\u7c7b\u578b&#xff08;bool&#xff09;<\/h4>\n<p>\u4ec5\u652f\u6301 true\/false \u4e24\u4e2a\u503c&#xff0c;\u65e0\u9690\u5f0f\u8f6c\u6362&#xff0c;\u5e38\u7528\u4e8e\u5224\u65ad\u8f6c\u6362\u6761\u4ef6&#xff1a;<\/p>\n<p>bool isInt &#061; a is int; \/\/ \u5224\u65ad\u662f\u5426\u4e3aint\u7c7b\u578b&#xff0c;\u7ed3\u679c&#xff1a;true<br \/>\nbool isDouble &#061; b is double; \/\/ \u7ed3\u679c&#xff1a;true<\/p>\n<h4>4.3 \u5b57\u7b26\u4e32\u7c7b\u578b&#xff08;String&#xff09;<\/h4>\n<p>\u8865\u5145\u6570\u5b57\u4e0e\u5b57\u7b26\u4e32\u7684\u4e92\u8f6c&#xff08;\u5f00\u53d1\u4e2d\u9ad8\u9891\u573a\u666f&#xff09;&#xff1a;<\/p>\n<p>\/\/ \u6570\u5b57 \u2192 \u5b57\u7b26\u4e32<br \/>\nString aStr &#061; a.toString(); \/\/ int\u2192String&#xff0c;\u7ed3\u679c&#xff1a;&#034;10&#034;<br \/>\nString bStr &#061; b.toStringAsFixed(1); \/\/ double\u4fdd\u75591\u4f4d\u5c0f\u6570\u8f6c\u5b57\u7b26\u4e32&#xff0c;\u7ed3\u679c&#xff1a;&#034;20.5&#034;<\/p>\n<p>\/\/ \u5b57\u7b26\u4e32 \u2192 \u6570\u5b57<br \/>\nint strToInt &#061; int.parse(&#034;5&#034;); \/\/ \u7ed3\u679c&#xff1a;5<br \/>\ndouble strToDouble &#061; double.parse(&#034;8.9&#034;); \/\/ \u7ed3\u679c&#xff1a;8.9<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172502-69710bee3a8ff.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>5. \u5217\u8868\u548c\u5b57\u5178\u7c7b\u578b<\/h3>\n<h4>5.1 \u5217\u8868&#xff08;List&#xff09;<\/h4>\n<p>\u6709\u5e8f\u96c6\u5408&#xff0c;\u6838\u5fc3\u64cd\u4f5c\u793a\u4f8b&#xff1a;<\/p>\n<p>void main() {<br \/>\n  List&lt;String&gt; fruits &#061; [&#034;\u82f9\u679c&#034;, &#034;\u9999\u8549&#034;, &#034;\u6a59\u5b50&#034;];<\/p>\n<p>  \/\/ \u65b0\u589e<br \/>\n  fruits.add(&#034;\u8461\u8404&#034;); \/\/ \u5355\u4e2a\u6dfb\u52a0<br \/>\n  fruits.addAll([&#034;\u8349\u8393&#034;, &#034;\u8292\u679c&#034;]); \/\/ \u6279\u91cf\u6dfb\u52a0<\/p>\n<p>  \/\/ \u5220\u9664<br \/>\n  fruits.remove(&#034;\u9999\u8549&#034;); \/\/ \u5220\u9664\u6307\u5b9a\u5185\u5bb9<br \/>\n  fruits.removeLast(); \/\/ \u5220\u9664\u6700\u540e\u4e00\u4e2a\u5143\u7d20<br \/>\n  fruits.removeRange(1, 3); \/\/ \u5220\u9664\u7d22\u5f151-2&#xff08;\u542b\u5934\u4e0d\u542b\u5c3e&#xff09;<\/p>\n<p>  \/\/ \u904d\u5386\/\u7b5b\u9009\/\u5224\u65ad<br \/>\n  fruits.forEach((i) &#061;&gt; print(&#034;\u6c34\u679c&#xff1a;$i&#034;)); \/\/ \u904d\u5386<br \/>\n  bool allHasWord &#061; fruits.every((i) &#061;&gt; i.contains(&#034;\u679c&#034;)); \/\/ \u5168\u91cf\u5224\u65ad<br \/>\n  List&lt;String&gt; filterList &#061; fruits.where((i) &#061;&gt; i.contains(&#034;\u8349&#034;)).toList(); \/\/ \u7b5b\u9009<\/p>\n<p>  \/\/ \u5c5e\u6027<br \/>\n  int len &#061; fruits.length; \/\/ \u957f\u5ea6<br \/>\n  String first &#061; fruits.first; \/\/ \u9996\u4e2a\u5143\u7d20<br \/>\n  String last &#061; fruits.last; \/\/ \u6700\u540e\u4e00\u4e2a\u5143\u7d20<br \/>\n  bool empty &#061; fruits.isEmpty; \/\/ \u5224\u7a7a<br \/>\n}<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172502-69710bee6faea.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172502-69710beeb0f5d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h4>5.2 \u5b57\u5178&#xff08;Map&#xff09;<\/h4>\n<p>\u64cd\u4f5c\u5b9e\u4f8b\u5982\u4e0b&#xff1a;<\/p>\n<p>void main() {<br \/>\n  Map&lt;String, dynamic&gt; user &#061; {<br \/>\n    &#034;name&#034;: &#034;\u5f20\u4e09&#034;,<br \/>\n    &#034;age&#034;: 20,<br \/>\n    &#034;gender&#034;: &#034;\u7537&#034;<br \/>\n  };<\/p>\n<p>  \/\/ \u65b0\u589e\/\u6279\u91cf\u65b0\u589e<br \/>\n  user[&#034;phone&#034;] &#061; &#034;123456&#034;; \/\/ \u5355\u4e2a\u6dfb\u52a0\u952e\u503c\u5bf9<br \/>\n  user.addAll({&#034;email&#034;: &#034;test&#064;163.com&#034;, &#034;isVip&#034;: false}); \/\/ \u6279\u91cf\u6dfb\u52a0<\/p>\n<p>  \/\/ \u5220\u9664<br \/>\n  user.remove(&#034;age&#034;); \/\/ \u5220\u9664\u6307\u5b9akey\u7684\u952e\u503c\u5bf9<br \/>\n  user.removeWhere((key, value) &#061;&gt; key &#061;&#061; &#034;gender&#034;); \/\/ \u6309\u6761\u4ef6\u5220\u9664<br \/>\n  user.clear(); \/\/ \u6e05\u7a7a\u6240\u6709\u952e\u503c\u5bf9&#xff08;\u8865\u5145\u9ad8\u9891\u64cd\u4f5c&#xff09;<\/p>\n<p>  \/\/ \u904d\u5386\/\u7b5b\u9009\/\u5224\u65ad<br \/>\n  user.forEach((key, value) &#061;&gt; print(&#034;$key: $value&#034;)); \/\/ \u904d\u5386<br \/>\n  \/\/ \u6240\u6709value\u662f\u5426\u4e3a\u5b57\u7b26\u4e32&#xff08;\u5168\u91cf\u5224\u65ad&#xff09;<br \/>\n  bool allIsStr &#061; user.values.every((v) &#061;&gt; v is String);<br \/>\n  \/\/ \u7b5b\u9009key\u5305\u542b&#034;e&#034;\u7684\u952e\u503c\u5bf9<br \/>\n  Map&lt;String, dynamic&gt; filterMap &#061; Map.fromEntries(<br \/>\n    user.entries.where((e) &#061;&gt; e.key.contains(&#034;e&#034;))<br \/>\n  );<\/p>\n<p>  \/\/ \u5c5e\u6027<br \/>\n  int len &#061; user.length; \/\/ \u957f\u5ea6<br \/>\n  bool empty &#061; user.isEmpty; \/\/ \u5224\u7a7a<br \/>\n  bool hasKey &#061; user.containsKey(&#034;name&#034;); \/\/ \u662f\u5426\u5305\u542b\u6307\u5b9akey<br \/>\n  bool hasValue &#061; user.containsValue(&#034;\u5f20\u4e09&#034;); \/\/ \u662f\u5426\u5305\u542b\u6307\u5b9avalue<br \/>\n  dynamic firstValue &#061; user.values.first; \/\/ \u9996\u4e2avalue&#xff08;\u65e0\u5e8f&#xff0c;\u4ec5\u53d6\u7b2c\u4e00\u4e2a&#xff09;<br \/>\n  dynamic lastValue &#061; user.values.last; \/\/ \u6700\u540e\u4e00\u4e2avalue&#xff08;\u65e0\u5e8f&#xff0c;\u4ec5\u53d6\u6700\u540e\u4e00\u4e2a&#xff09;<br \/>\n}<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172502-69710beec8fc8.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172503-69710bef2a6f5.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>6. \u7b97\u6570\u3001\u8d4b\u503c\u3001\u6bd4\u8f83\u3001\u903b\u8f91\u8fd0\u7b97\u7b26<\/h3>\n<h4>6.1 \u7b97\u6570\u8fd0\u7b97\u7b26<\/h4>\n<p>\u7528\u4e8e\u6570\u503c\u8ba1\u7b97&#xff0c;\u6838\u5fc3\u8fd0\u7b97\u7b26\u53ca\u793a\u4f8b&#xff1a;<\/p>\n<p>void main() {<br \/>\n  int a &#061; 10, b &#061; 3;<br \/>\n  print(a &#043; b); \/\/ \u52a0\u6cd5&#xff0c;\u7ed3\u679c&#xff1a;13<br \/>\n  print(a &#8211; b); \/\/ \u51cf\u6cd5&#xff0c;\u7ed3\u679c&#xff1a;7<br \/>\n  print(a * b); \/\/ \u4e58\u6cd5&#xff0c;\u7ed3\u679c&#xff1a;30<br \/>\n  print(a \/ b); \/\/ \u9664\u6cd5&#xff08;\u8fd4\u56de\u6d6e\u70b9\u6570&#xff09;&#xff0c;\u7ed3\u679c&#xff1a;3.333&#8230;<br \/>\n  print(a ~\/ b); \/\/ \u6574\u9664&#xff08;\u8fd4\u56de\u6574\u6570&#xff09;&#xff0c;\u7ed3\u679c&#xff1a;3<br \/>\n  print(a % b); \/\/ \u53d6\u4f59&#xff0c;\u7ed3\u679c&#xff1a;1<br \/>\n  print(&#043;&#043;a); \/\/ \u81ea\u589e&#xff08;\u5148\u52a0\u540e\u7528&#xff09;&#xff0c;\u7ed3\u679c&#xff1a;11<br \/>\n  print(b&#8211;); \/\/ \u81ea\u51cf&#xff08;\u5148\u7528\u540e\u51cf&#xff09;&#xff0c;\u7ed3\u679c&#xff1a;3<br \/>\n}<\/p>\n<h4>6.2 \u8d4b\u503c\u8fd0\u7b97\u7b26<\/h4>\n<p>\u7528\u4e8e\u7ed9\u53d8\u91cf\u8d4b\u503c&#xff0c;\u57fa\u7840\u8d4b\u503c &#061; \u7ed3\u5408\u7b97\u6570\u8fd0\u7b97\u7b26\u53ef\u7b80\u5316\u5199\u6cd5&#xff1a;<\/p>\n<p>void main() {<br \/>\n  int x &#061; 8;<br \/>\n  x &#043;&#061; 2; \/\/ \u7b49\u4ef7\u4e8e x &#061; x &#043; 2&#xff0c;\u7ed3\u679c&#xff1a;10<br \/>\n  x -&#061; 3; \/\/ \u7b49\u4ef7\u4e8e x &#061; x &#8211; 3&#xff0c;\u7ed3\u679c&#xff1a;7<br \/>\n  x *&#061; 2; \/\/ \u7b49\u4ef7\u4e8e x &#061; x * 2&#xff0c;\u7ed3\u679c&#xff1a;14<br \/>\n  x \/&#061; 2; \/\/ \u7b49\u4ef7\u4e8e x &#061; x \/ 2&#xff0c;\u7ed3\u679c&#xff1a;7.0<br \/>\n  x %&#061; 3; \/\/ \u7b49\u4ef7\u4e8e x &#061; x % 3&#xff0c;\u7ed3\u679c&#xff1a;1.0<br \/>\n}<\/p>\n<h4>6.3 \u6bd4\u8f83\u8fd0\u7b97\u7b26<\/h4>\n<p>\u7528\u4e8e\u5224\u65ad\u4e24\u4e2a\u503c\u7684\u5173\u7cfb&#xff0c;\u8fd4\u56de\u5e03\u5c14\u503c&#xff08;true\/false&#xff09;&#xff0c;\u662f\u6761\u4ef6\u5224\u65ad\u7684\u6838\u5fc3&#xff1a;<\/p>\n<p>void main() {<br \/>\n  int m &#061; 5, n &#061; 5;<br \/>\n  print(m &#061;&#061; n); \/\/ \u7b49\u4e8e&#xff0c;\u7ed3\u679c&#xff1a;true<br \/>\n  print(m !&#061; n); \/\/ \u4e0d\u7b49\u4e8e&#xff0c;\u7ed3\u679c&#xff1a;false<br \/>\n  print(m &gt; n); \/\/ \u5927\u4e8e&#xff0c;\u7ed3\u679c&#xff1a;false<br \/>\n  print(m &lt; n); \/\/ \u5c0f\u4e8e&#xff0c;\u7ed3\u679c&#xff1a;false<br \/>\n  print(m &gt;&#061; n); \/\/ \u5927\u4e8e\u7b49\u4e8e&#xff0c;\u7ed3\u679c&#xff1a;true<br \/>\n  print(m &lt;&#061; n); \/\/ \u5c0f\u4e8e\u7b49\u4e8e&#xff0c;\u7ed3\u679c&#xff1a;true<br \/>\n}<\/p>\n<h4>6.4 \u903b\u8f91\u8fd0\u7b97\u7b26<\/h4>\n<p>\u7528\u4e8e\u7ec4\u5408\u591a\u4e2a\u5e03\u5c14\u6761\u4ef6&#xff0c;\u8fd4\u56de\u5e03\u5c14\u503c&#xff0c;\u5e38\u7528\u5728\u591a\u6761\u4ef6\u5224\u65ad\u573a\u666f&#xff1a;<\/p>\n<p>void main() {<br \/>\n  bool isAdult &#061; true, hasId &#061; false;<br \/>\n  print(isAdult &amp;&amp; hasId); \/\/ \u903b\u8f91\u4e0e&#xff08;\u90fd\u4e3atrue\u624dtrue&#xff09;&#xff0c;\u7ed3\u679c&#xff1a;false<br \/>\n  print(isAdult || hasId); \/\/ \u903b\u8f91\u6216&#xff08;\u4e00\u4e2a\u4e3atrue\u5c31true&#xff09;&#xff0c;\u7ed3\u679c&#xff1a;true<br \/>\n  print(!isAdult); \/\/ \u903b\u8f91\u975e&#xff08;\u53d6\u53cd&#xff09;&#xff0c;\u7ed3\u679c&#xff1a;false<br \/>\n}<\/p>\n<h3>7. if \u5206\u652f\u548c\u4e09\u5143\u8fd0\u7b97\u7b26<\/h3>\n<h4>7.1 if \u5206\u652f<\/h4>\n<p>\u652f\u6301 if\u3001if-else\u3001if-else if-else \u591a\u5206\u652f\u7ed3\u6784&#xff0c;\u6761\u4ef6\u8868\u8fbe\u5f0f\u5fc5\u987b\u8fd4\u56de\u5e03\u5c14\u503c&#xff1a;<\/p>\n<p>void main() {<br \/>\n  int score &#061; 85;<\/p>\n<p>  \/\/ \u5355\u5206\u652f<br \/>\n  if (score &gt;&#061; 60) {<br \/>\n    print(&#034;\u53ca\u683c&#034;);<br \/>\n  }<\/p>\n<p>  \/\/ \u53cc\u5206\u652f<br \/>\n  if (score &gt;&#061; 90) {<br \/>\n    print(&#034;\u4f18\u79c0&#034;);<br \/>\n  } else {<br \/>\n    print(&#034;\u975e\u4f18\u79c0&#034;);<br \/>\n  }<\/p>\n<p>  \/\/ \u591a\u5206\u652f<br \/>\n  if (score &gt;&#061; 90) {<br \/>\n    print(&#034;\u4f18\u79c0&#034;);<br \/>\n  } else if (score &gt;&#061; 80) {<br \/>\n    print(&#034;\u826f\u597d&#034;);<br \/>\n  } else if (score &gt;&#061; 60) {<br \/>\n    print(&#034;\u53ca\u683c&#034;);<br \/>\n  } else {<br \/>\n    print(&#034;\u4e0d\u53ca\u683c&#034;);<br \/>\n  }<br \/>\n}<\/p>\n<h4>7.2 \u4e09\u5143\u8fd0\u7b97\u7b26<\/h4>\n<p>\u8bed\u6cd5&#xff1a;\u6761\u4ef6\u8868\u8fbe\u5f0f ? \u8868\u8fbe\u5f0f1 : \u8868\u8fbe\u5f0f2&#xff0c;\u6761\u4ef6\u4e3a true \u6267\u884c\u8868\u8fbe\u5f0f 1&#xff0c;\u5426\u5219\u6267\u884c\u8868\u8fbe\u5f0f 2&#xff0c;\u7b80\u5316\u7b80\u5355\u7684 if-else \u903b\u8f91&#xff1a;<\/p>\n<p>void main() {<br \/>\n  int age &#061; 18;<br \/>\n  \/\/ \u57fa\u7840\u7528\u6cd5&#xff1a;\u5224\u65ad\u662f\u5426\u6210\u5e74<br \/>\n  String result &#061; age &gt;&#061; 18 ? &#034;\u6210\u5e74&#034; : &#034;\u672a\u6210\u5e74&#034;;<br \/>\n  print(result); \/\/ \u7ed3\u679c&#xff1a;\u6210\u5e74<\/p>\n<p>  \/\/ \u5d4c\u5957\u7528\u6cd5&#xff08;\u614e\u7528&#xff0c;\u907f\u514d\u53ef\u8bfb\u6027\u5dee&#xff09;<br \/>\n  int score &#061; 75;<br \/>\n  String level &#061; score &gt;&#061; 90 ? &#034;\u4f18\u79c0&#034; : (score &gt;&#061; 60 ? &#034;\u53ca\u683c&#034; : &#034;\u4e0d\u53ca\u683c&#034;);<br \/>\n  print(level); \/\/ \u7ed3\u679c&#xff1a;\u53ca\u683c<br \/>\n}<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260121172503-69710bef60bbf.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>8. switch \u548c case<\/h3>\n<h4>8.1 \u57fa\u7840\u7528\u6cd5<\/h4>\n<p>\u8bed\u6cd5&#xff1a;switch(\u8868\u8fbe\u5f0f) { case \u5e38\u91cf\u503c: \u6267\u884c\u903b\u8f91; break; default: \u9ed8\u8ba4\u903b\u8f91; }&#xff0c;\u9700\u6ce8\u610f&#xff1a;<\/p>\n<ul>\n<li>\u8868\u8fbe\u5f0f\u7ed3\u679c\u9700\u4e3a\u5e38\u91cf\u7c7b\u578b&#xff08;int\/String\/enum \u7b49&#xff09;&#xff1b; \u6bcf\u4e2a case \u672b\u5c3e\u9700\u52a0<\/li>\n<li>break&#xff08;\u5426\u5219\u4f1a\u7a7f\u900f\u5230\u4e0b\u4e00\u4e2a case&#xff09;&#xff1b;<\/li>\n<li>default \u5904\u7406\u6240\u6709\u672a\u5339\u914d\u7684\u60c5\u51b5&#xff08;\u53ef\u9009&#xff09;\u3002<\/li>\n<\/ul>\n<p>void main() {<br \/>\n  String week &#061; &#034;\u5468\u4e8c&#034;;<\/p>\n<p>  switch (week) {<br \/>\n    case &#034;\u5468\u4e00&#034;:<br \/>\n      print(&#034;\u5f00\u59cb\u4e00\u5468\u7684\u5de5\u4f5c&#034;);<br \/>\n      break; \/\/ \u7ec8\u6b62\u5f53\u524dcase&#xff0c;\u907f\u514d\u7a7f\u900f<br \/>\n    case &#034;\u5468\u4e8c&#034;:<br \/>\n      print(&#034;\u7ee7\u7eed\u63a8\u8fdb\u4efb\u52a1&#034;);<br \/>\n      break;<br \/>\n    case &#034;\u5468\u4e94&#034;:<br \/>\n      print(&#034;\u51c6\u5907\u5468\u672b&#034;);<br \/>\n      break;<br \/>\n    default: \/\/ \u5339\u914d\u4e0d\u5230\u4ee5\u4e0acase\u65f6\u6267\u884c<br \/>\n      print(&#034;\u6b63\u5e38\u4e0a\u73ed&#034;);<br \/>\n  }<br \/>\n}<\/p>\n<h4>8.2 \u7279\u6b8a\u573a\u666f&#xff1a;case \u7a7f\u900f&#xff08;\u614e\u7528&#xff09;<\/h4>\n<p>\u82e5\u7701\u7565 break&#xff0c;\u4f1a\u6267\u884c\u5f53\u524d case \u53ca\u540e\u7eed\u6240\u6709 case \u903b\u8f91&#xff0c;\u4ec5\u5728\u7279\u5b9a\u573a\u666f\u4f7f\u7528&#xff1a;<\/p>\n<p>void main() {<br \/>\n  int num &#061; 1;<\/p>\n<p>  switch (num) {<br \/>\n    case 1:<br \/>\n    case 2: \/\/ 1\u548c2\u6267\u884c\u540c\u4e00\u903b\u8f91<br \/>\n      print(&#034;\u6570\u5b57\u662f1\u62162&#034;);<br \/>\n      break;<br \/>\n    case 3:<br \/>\n      print(&#034;\u6570\u5b57\u662f3&#034;);<br \/>\n      break;<br \/>\n  }<br \/>\n}<\/p>\n<h3>9. while \u548c for \u5faa\u73af<\/h3>\n<h4>9.1 while \u5faa\u73af<\/h4>\n<p>\u8bed\u6cd5&#xff1a;while(\u6761\u4ef6\u8868\u8fbe\u5f0f) { \u5faa\u73af\u4f53 }&#xff0c;\u5148\u5224\u65ad\u6761\u4ef6&#xff08;\u5e03\u5c14\u503c&#xff09;&#xff0c;\u4e3a true \u5219\u6267\u884c\u5faa\u73af\u4f53&#xff0c;\u76f4\u5230\u6761\u4ef6\u4e3a false \u7ec8\u6b62&#xff1b;do-while \u662f\u53d8\u4f53&#xff0c;\u5148\u6267\u884c\u4e00\u6b21\u5faa\u73af\u4f53\u518d\u5224\u65ad\u6761\u4ef6\u3002<\/p>\n<p>void main() {<br \/>\n  \/\/ \u57fa\u7840while\u5faa\u73af<br \/>\n  int count &#061; 0;<br \/>\n  while (count &lt; 3) { \/\/ \u6761\u4ef6\u4e3atrue\u65f6\u6267\u884c<br \/>\n    print(&#034;\u5faa\u73af\u6b21\u6570&#xff1a;${count &#043; 1}&#034;);<br \/>\n    count&#043;&#043;; \/\/ \u5fc5\u987b\u4fee\u6539\u6761\u4ef6\u53d8\u91cf&#xff0c;\u5426\u5219\u6b7b\u5faa\u73af<br \/>\n  } \/\/ \u8f93\u51fa&#xff1a;\u5faa\u73af\u6b21\u65701\/2\/3<\/p>\n<p>  \/\/ do-while\u5faa\u73af&#xff08;\u81f3\u5c11\u6267\u884c\u4e00\u6b21&#xff09;<br \/>\n  int num &#061; 5;<br \/>\n  do {<br \/>\n    print(&#034;\u6570\u5b57&#xff1a;$num&#034;);<br \/>\n    num&#043;&#043;;<br \/>\n  } while (num &lt; 3); \/\/ \u6761\u4ef6\u4e3afalse&#xff0c;\u4f46\u4ecd\u6267\u884c1\u6b21&#xff0c;\u8f93\u51fa&#xff1a;\u6570\u5b57&#xff1a;5<br \/>\n}<\/p>\n<h4>9.2 for \u5faa\u73af<\/h4>\n<p>\u8bed\u6cd5&#xff1a;for(\u521d\u59cb\u5316\u53d8\u91cf; \u6761\u4ef6\u8868\u8fbe\u5f0f; \u66f4\u65b0\u53d8\u91cf) { \u5faa\u73af\u4f53 }&#xff0c;\u9002\u5408\u5df2\u77e5\u5faa\u73af\u6b21\u6570\u7684\u573a\u666f&#xff0c;\u8fd8\u6709 for-in \u7b80\u5316\u904d\u5386\u96c6\u5408\u7684\u5199\u6cd5\u3002<\/p>\n<p>void main() {<br \/>\n  \/\/ \u57fa\u7840for\u5faa\u73af<br \/>\n  for (int i &#061; 0; i &lt; 3; i&#043;&#043;) { \/\/ \u521d\u59cb\u5316\u2192\u5224\u65ad\u2192\u6267\u884c\u2192\u66f4\u65b0<br \/>\n    print(&#034;i\u7684\u503c&#xff1a;$i&#034;); \/\/ \u8f93\u51fa&#xff1a;0\/1\/2<br \/>\n  }<\/p>\n<p>  \/\/ for-in\u5faa\u73af&#xff08;\u904d\u5386\u96c6\u5408&#xff0c;\u5e38\u7528&#xff09;<br \/>\n  List&lt;String&gt; fruits &#061; [&#034;\u82f9\u679c&#034;, &#034;\u9999\u8549&#034;, &#034;\u6a59\u5b50&#034;];<br \/>\n  for (String fruit in fruits) {<br \/>\n    print(&#034;\u6c34\u679c&#xff1a;$fruit&#034;); \/\/ \u4f9d\u6b21\u8f93\u51fa\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20<br \/>\n  }<\/p>\n<p>  \/\/ \u5d4c\u5957for\u5faa\u73af&#xff08;\u614e\u7528&#xff0c;\u907f\u514d\u6027\u80fd\u95ee\u9898&#xff09;<br \/>\n  for (int i &#061; 1; i &lt;&#061; 2; i&#043;&#043;) {<br \/>\n    for (int j &#061; 1; j &lt;&#061; 2; j&#043;&#043;) {<br \/>\n      print(&#034;i&#061;$i, j&#061;$j&#034;); \/\/ \u8f93\u51fa&#xff1a;i&#061;1j&#061;1 \/ i&#061;1j&#061;2 \/ i&#061;2j&#061;1 \/ i&#061;2j&#061;2<br \/>\n    }<br \/>\n  }<br \/>\n}<\/p>\n<h4>9.3 \u5faa\u73af\u63a7\u5236&#xff1a;break \u548c continue<\/h4>\n<p>break&#xff1a;\u7ec8\u6b62\u6574\u4e2a\u5faa\u73af&#xff0c;\u76f4\u63a5\u8df3\u51fa&#xff1b; continue&#xff1a;\u8df3\u8fc7\u5f53\u524d\u6b21\u5faa\u73af&#xff0c;\u8fdb\u5165\u4e0b\u4e00\u6b21\u5faa\u73af\u3002<\/p>\n<p>void main() {<br \/>\n  \/\/ break\u793a\u4f8b&#xff1a;\u5faa\u73af\u5230\u7b2c2\u6b21\u7ec8\u6b62<br \/>\n  for (int i &#061; 0; i &lt; 5; i&#043;&#043;) {<br \/>\n    if (i &#061;&#061; 2) break;<br \/>\n    print(&#034;break\u793a\u4f8b&#xff1a;$i&#034;); \/\/ \u8f93\u51fa&#xff1a;0\/1<br \/>\n  }<\/p>\n<p>  \/\/ continue\u793a\u4f8b&#xff1a;\u8df3\u8fc7\u7b2c2\u6b21\u5faa\u73af<br \/>\n  for (int i &#061; 0; i &lt; 5; i&#043;&#043;) {<br \/>\n    if (i &#061;&#061; 2) continue;<br \/>\n    print(&#034;continue\u793a\u4f8b&#xff1a;$i&#034;); \/\/ \u8f93\u51fa&#xff1a;0\/1\/3\/4<br \/>\n  }<br \/>\n}<\/p>\n<h2>\u7ed3\u5c3e<\/h2>\n<p>\u5230\u8fd9\u91cc&#xff0c;Dart \u8bed\u8a00\u4e0a\u7bc7\u7684\u6838\u5fc3\u5185\u5bb9\u5c31\u5168\u90e8\u8bb2\u5b8c\u5566&#xff01;\u4ece\u642d\u5efa\u597d Dart \u7684\u5f00\u53d1\u73af\u5883&#xff0c;\u5230\u5b66\u4f1a\u58f0\u660e\u53d8\u91cf\u5e38\u91cf\u3001\u5904\u7406\u6570\u5b57 \/ \u5b57\u7b26\u4e32\u7b49\u57fa\u7840\u6570\u636e&#xff0c;\u518d\u5230\u7528\u5217\u8868 \/ \u5b57\u5178\u7ba1\u7406\u6570\u636e\u3001\u7528\u5206\u652f\u548c\u5faa\u73af\u63a7\u5236\u4ee3\u7801\u903b\u8f91&#xff0c;\u8fd9\u4e9b\u90fd\u662f Dart \u6700\u57fa\u7840\u4e5f\u6700\u5b9e\u7528\u7684\u8bed\u6cd5&#xff0c;\u4e5f\u662f\u540e\u7eed\u505a Flutter \u5f00\u53d1\u3001\u5bf9\u63a5 HarmonyOS \u7684\u5fc5\u5907\u6280\u80fd\u3002<\/p>\n<p>\u6bd4\u5982\u4f60\u73b0\u5728\u638c\u63e1\u7684\u5217\u8868\u904d\u5386&#xff0c;\u80fd\u7528\u6765\u5b58\u50a8\u9e3f\u8499\u4e0d\u540c\u8bbe\u5907\u7684\u914d\u7f6e\u4fe1\u606f&#xff1b;\u5b66\u4f1a\u7684 if 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