{"id":68565,"date":"2026-01-30T09:24:58","date_gmt":"2026-01-30T01:24:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/68565.html"},"modified":"2026-01-30T09:24:58","modified_gmt":"2026-01-30T01:24:58","slug":"harmonyos-app%e5%bc%80%e5%8f%91-%e4%b8%80%e6%96%87%e8%af%b4%e6%b8%85%e5%9f%ba%e7%a1%80%e7%b1%bb%e5%9e%8b%e6%95%b0%e6%8d%ae%e7%9a%84%e9%9d%9e%e9%a2%84%e6%9c%9f%e8%be%93%e5%85%a5%e8%bd%ac%e6%8d%a2","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/68565.html","title":{"rendered":"HarmonyOS APP\u5f00\u53d1-\u4e00\u6587\u8bf4\u6e05\u57fa\u7840\u7c7b\u578b\u6570\u636e\u7684\u975e\u9884\u671f\u8f93\u5165\u8f6c\u6362\u4e0e\u515c\u5e95-\u300a\u7cbe\u901aHarmonyOS NEXT \uff1a\u9e3f\u8499App\u5f00\u53d1\u5165\u95e8\u4e0e\u9879\u76ee\u5316\u5b9e\u6218\u300b\u8bfb\u8005\u798f\u5229"},"content":{"rendered":"<p>\u5728\u5ba2\u6237\u7aef\u5f00\u53d1\u4e2d&#xff0c;\u4f60\u662f\u5426\u66fe\u9047\u5230\u8fc7\u8fd9\u6837\u7684\u56f0\u6270&#xff1a;\u4e00\u6b21\u770b\u4f3c\u5bfb\u5e38\u7684\u7f51\u7edc\u6570\u636e\u89e3\u6790&#xff0c;\u5374\u5bfc\u81f4\u4e86\u51fa\u4eba\u610f\u6599\u7684\u5d29\u6e83&#xff1b;\u4e00\u4e2a\u672c\u8be5\u6b63\u5e38\u7684\u6587\u4ef6\u8bfb\u53d6\u64cd\u4f5c&#xff0c;\u5374\u8fd4\u56de\u4e86\u96be\u4ee5\u7406\u89e3\u7684\u6570\u636e\u9519\u8bef\u3002\u8fd9\u4e9b\u95ee\u9898\u7684\u6839\u6e90&#xff0c;\u5f80\u5f80\u6307\u5411\u540c\u4e00\u73af\u8282\u2014\u2014\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u3002\u5f53\u5e94\u7528\u9762\u5bf9\u7f51\u7edc\u4f20\u8f93\u3001\u6587\u4ef6I\/O\u7b49\u4e0d\u53ef\u63a7\u7684\u6570\u636e\u6e90\u65f6&#xff0c;\u5982\u4f55\u7a33\u5065\u3001\u51c6\u786e\u5730\u8fdb\u884c\u6570\u636e\u89e3\u6790\u4e0e\u8f6c\u6362&#xff0c;\u5c31\u6210\u4e3a\u4fdd\u969c\u5e94\u7528\u7a33\u5b9a\u6027\u7684\u7b2c\u4e00\u9053\u9632\u7ebf\u3002<\/p>\n<p>\u672c\u7bc7\u5185\u5bb9\u662f\u300a\u7cbe\u901aHarmonyOS NEXT &#xff1a;\u9e3f\u8499App\u5f00\u53d1\u5165\u95e8\u4e0e\u9879\u76ee\u5316\u5b9e\u6218\u300b\u8fd9\u672c\u4e66\u7b2c\u56db\u7ae0\u5185\u5bb9\u7684\u5ef6\u7eed&#xff0c;\u662f\u54b1\u8fd9\u672c\u4e66\u8bfb\u8005\u7684\u798f\u5229&#xff0c;\u5728\u672c\u7bc7\u5185\u5bb9\u4e2d\u4ee5\u6a21\u62df\u591a\u79cd\u6570\u636e\u8f93\u5165&#xff0c;\u5411\u57fa\u7840\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u7684\u8f93\u51fa&#xff0c;\u4ee5\u786e\u5b9a\u6700\u4f18\u7684\u4ee3\u7801\u7f16\u65b9\u5f0f&#xff0c;\u4ee5\u907f\u514d\u975e\u9884\u671f\u7684\u5f02\u5e38\u4ea7\u751f&#xff0c;\u6bcf\u4e2a\u793a\u4f8b\u53ef\u4ee5\u72ec\u7acb\u7684\u7f16\u8bd1\u53ca\u8c03\u8bd5&#xff0c;\u6b22\u8fce\u5927\u5bb6\u4e00\u540c\u6765\u6df1\u5165\u7684\u89e3&#xff0c;\u751a\u81f3\u53ef\u4ee5\u5f53\u4f5c\u9762\u8bd5\u9898\u6765\u5b66\u4e60\u3002<\/p>\n<p>\u00a0\u5bf9\u672c\u4e66\u611f\u5174\u8da3\u7684\u540c\u5b66\u53ef\u4ee5\u70b9\u51fb\u4ee5\u4e0b\u94fe\u63a5\u8fdb\u884c\u8d2d\u4e70&#xff0c;\u53ca\u53c2\u52a0\u00a0<span>\u6211\u7684\u73ed\u7ea7&#xff08;\u534e\u4e3a\u5b98\u65b9&#xff09;\u5171\u540c\u5b66\u4e60<\/span><\/p>\n<ul>\n<li><span>\u673a\u68b0\u5de5\u4e1a\u51fa\u7248\u793e\u5b98\u65b9\u4eac\u4e1c\u65d7\u8230\u5e97<\/span><\/li>\n<li><span>\u673a\u68b0\u5de5\u4e1a\u51fa\u7248\u793e\u4eac\u4e1c\u81ea\u8425\u65d7\u8230\u5e97<\/span><\/li>\n<li><span>\u673a\u68b0\u5de5\u4e1a\u51fa\u7248\u793e\u5b98\u65b9\u5f53\u5f53\u65d7\u8230\u5e97<\/span><\/li>\n<li><span>\u673a\u68b0\u5de5\u4e1a\u51fa\u7248\u793e\u5f53\u5f53\u81ea\u8425\u65d7\u8230\u5e97<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"284\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260130012455-697c0867e8560.jpg\" width=\"284\" \/>\u200b\u200b\u200b\u200b\u200b<\/p>\n<h3>\u8bfb\u8005\u798f\u5229<\/h3>\n<p><span>\u300a\u7cbe\u901aHarmonyOS NEXT &#xff1a;\u9e3f\u8499App\u5f00\u53d1\u5165\u95e8\u4e0e\u9879\u76ee\u5316\u5b9e\u6218\u300b\u8bfb\u8005\u798f\u5229\u535a\u6587\u76ee\u5f55&#xff0c;\u70b9\u51fb\u67e5\u770b<\/span><\/p>\n<\/p>\n<h3><\/h3>\n<h3><span style=\"color:#4da8ee\">1: \u57fa\u7840\u6d4b\u8bd5\u6570\u636e\u51c6\u5907<\/span><\/h3>\n<p>\u5728ArkTS\u4e2d&#xff0c;\u7531\u4e8e\u8bed\u8a00\u7684\u7279\u6027&#xff0c;\u65e0\u6cd5\u76f4\u63a5\u5bf9\u00a0null\u00a0\u53ca\u00a0undefined\u00a0\u8fdb\u884c\u76f4\u63a5\u5f3a\u8f6c&#xff0c;\u6545\u5148\u5c06\u8be5\u6570\u636e\u5b58\u5230Record\u4e2d&#xff0c;\u4e4b\u540e\u518d\u4f7f\u7528&#xff0c;\u7531\u4e8e\u5728Record\u7c7b\u578b\u6570\u636e\u4e2d\u6307\u5b9a\u7684key\u6ca1\u6709value\u65f6\u4f1a\u8fd4\u56deundefined&#xff0c;\u6545\u5728\u793a\u4f8b\u4e2d\u6ca1\u6709\u6dfb\u52a0\u8be5value\u4e3aundefined\u7684\u6570\u636e\u9879\u3002<\/p>\n<p>\/\/ \u58f0\u660e\u4e00\u4e2a\u53d8\u91cftestRecord&#xff0c;\u5176\u4e2d\u5305\u542b\u5b57\u4e32\u3001\u6570\u5b57\u548cnull\u6570\u636e&#xff0c;\u53ef\u4ee5\u901a\u8fc7testRecord\u83b7\u53d6\u5bf9\u5e94\u7684\u4e0d\u540c\u7c7b\u578b\u6570\u636e<br \/>\nconst testRecord:Record&lt;string,Object|null|number&gt;&#061; {&#034;null_key&#034;:null,&#034;str_key&#034;:&#034;1xxx&#034;,&#034;num_key&#034;:&#034;666&#034;} <\/p>\n<h3><span style=\"color:#4da8ee\">2: \u4e0d\u540c\u7c7b\u578b\u6570\u636e\u8f6cstring<\/span><\/h3>\n<p>\u4e0b\u9762\u7684\u793a\u4f8b\u4e2d&#xff0c;\u5206\u522b\u5c06null\u3001undefined\u3001\u901a\u8fc7Strinrg(&#8230;) \u548c &#8230; as string\u8fdb\u884c\u5411\u5b57\u7b26\u4e32\u8f6c\u6362\u3002<\/p>\n<p>const String_null &#061; String(null)<br \/>\n\/\/ String(null) null<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 String(null) &#034; &#043; String_null)<\/p>\n<p>const String_undefined &#061; String(undefined)<br \/>\n\/\/ String(undefined) undefined<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 String(undefined) &#034; &#043; String_undefined)<\/p>\n<p>const testRecord_null &#061; testRecord[&#034;null_key&#034;];<br \/>\nconst nullAsString &#061; testRecord_null as String;<br \/>\n\/\/ nullValueAsString null<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 nullValueAsString &#034; &#043; nullAsString)<\/p>\n<p>const testRecord_nokey &#061; testRecord[&#034;nokey&#034;];<br \/>\nconst noKeyValueAsString &#061; testRecord_nokey as String;<\/p>\n<p>\/\/ noKeyValueAsString undefined<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 noKeyValueAsString &#034; &#043; noKeyValueAsString)<\/p>\n<p><span style=\"color:#0d0016\">\u5bf9\u5e94\u7684log\u8f93\u51fa\u53ca\u7f16\u8bd1\u8c03\u8bd5\u65f6\u7684\u53d8\u91cf\u72b6\u6001\u7684\u622a\u56fe&#xff0c;\u56e0\u4e3alog\u8f93\u51fa\u662f\u6ca1\u6709\u53cc\u5f15\u53f7\u7684&#xff0c;\u9700\u8981\u6ce8\u610f\u4e00\u4e0b\u5b9e\u9645\u7684\u53d8\u91cf\u503c&#xff0c;<\/span><span style=\"color:#4da8ee\">\u53ef\u4ee5\u770b\u51fa&#xff0c;String(&#8230;)\u64cd\u4f5c\u5728\u5f3a\u8f6c\u65f6\u4f1a\u628anull\u548cundefined\u5f3a\u8f6c\u4e3a&#034;null&#034;\u548c&#034;undefined&#034;\u3002\u800c&#8230; as string\u7684\u64cd\u4f5c\u5bf9\u4e8enull\u548cundefined\u5f3a\u8f6c\u4e4b\u540e\u7684\u7ed3\u679c\u4f9d\u7136\u662fnull\u548cundefined\u3002\u8fd9\u65f6\u5982\u679c\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u6709\u6548&#xff0c;\u4f7f\u7528\u7684\u65b9\u5f0f\u5c31\u6709\u6240\u4e0d\u540c\u4e86\u3002\u6216\u8005\u5e94\u8be5\u5148\u5bf9\u8be5\u539f\u503c\u8fdb\u884c\u6709\u6548\u6027\u5224\u65ad\u4e4b\u540e&#xff0c;\u518d\u8fdb\u884c\u5b57\u7b26\u4e32\u7684\u8f6c\u6362\u3002<\/span><\/p>\n<p>  <img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"178\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260130012456-697c08681b1a9.png\" width=\"562\" \/> <\/p>\n<p>   Log \u8f93\u51fa<\/p>\n<p> \u00a0 \u00a0 \u00a0\u00a0 <\/p>\n<p>  <img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"258\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260130012456-697c0868353c7.png\" width=\"600\" \/> <\/p>\n<p>   \u8c03\u8bd5\u6001&#xff0c;\u53ef\u770b\u53d8\u91cf\u503c<\/p>\n<h3><span style=\"color:#4da8ee\">3: \u4e0d\u540c\u7c7b\u578b\u8f6cnumber<\/span><\/h3>\n<p>\u4e0b\u9762\u7684\u793a\u4f8b\u4e2d&#xff0c;\u5206\u522b\u5c06null\u3001undefined\u53ca\u975e\u7eaf\u5b57\u7b26\u7684\u5b57\u4e32\u3001\u901a\u8fc7Number(&#8230;) \u548c &#8230; as number\u8fdb\u884c\u8f6c\u6362\u3002<\/p>\n<p>const Number_null &#061; Number(null)<br \/>\n\/\/ Number(null) 0<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 Number(null) &#034; &#043; Number_null)<br \/>\nconst Number_undefined &#061; Number(undefined)<br \/>\n\/\/ Number(undefined) NaN<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 Number(undefined) &#034; &#043; Number_undefined)<\/p>\n<p>const nullAsNumber &#061; testRecord_null as number;<br \/>\n\/\/ nullAsNumber null<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 nullAsNumber &#034; &#043; nullAsNumber)<br \/>\nconst noKeyValueAsNumber &#061; testRecord_nokey as number;<br \/>\n\/\/ noKeyValueAsNumber undefined<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 noKeyValueAsNumber &#034; &#043; noKeyValueAsNumber)<\/p>\n<p>\/\/ \u7279\u5b9a\u573a\u666f&#xff0c;\u975e\u6570\u5b57\u5b57\u4e32\u8f6c\u6570\u5b57<br \/>\nconst Number_str &#061; Number(&#034;1xxx&#034;);<br \/>\n\/\/ Number_str NaN<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 Number_str &#034; &#043; Number_str)<br \/>\nconst strValueAsNumber &#061; testRecord[&#034;str_key&#034;]  as number;<br \/>\n\/\/ strValueAsNumber 1xxx<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 strValueAsNumber &#034; &#043; strValueAsNumber)<br \/>\n\/\/ Number_str type number<br \/>\nconsole.log(&#034;\u4fe9\u6bdb\u8c46 Number_str type &#034; &#043; typeof Number_str)<\/p>\n<p><span style=\"color:#0d0016\">\u5bf9\u5e94\u7684log\u8f93\u51fa\u53ca\u7f16\u8bd1\u8c03\u8bd5\u65f6\u7684\u53d8\u91cf\u72b6\u6001\u7684\u622a\u56fe&#xff0c;<\/span><span style=\"color:#4da8ee\">\u53ef\u4ee5\u770b\u51fa&#xff0c;Number(&#8230;)\u64cd\u4f5c\u5728\u5f3a\u8f6c\u65f6\u4f1a\u628anull\u548cundefined\u5f3a\u8f6c\u4e3a0\u548cNaN\u3002\u800c&#8230; as number\u7684\u64cd\u4f5c\u5bf9\u4e8enull\u548cundefined\u5f3a\u8f6c\u4e4b\u540e\u7684\u7ed3\u679c\u4f9d\u7136\u662fnull\u548cundefined\u3002\u5f53\u8f93\u5165\u7684\u6570\u636e\u4e3a\u975e\u7eaf\u6570\u5b57\u7684\u5b57\u7b26\u4e32\u65f6&#xff0c;Number(&#8230;)\u64cd\u4f5c\u5728\u5f3a\u8f6c\u65f6\u4f1a\u628a\u975e\u7eaf\u6570\u5b57\u7684\u5b57\u7b26\u4e32\u5f3a\u8f6c\u4e3aNaN&#xff0c;\u800c&#8230; as number\u7684\u64cd\u4f5c\u5bf9\u4e8e\u975e\u7eaf\u6570\u5b57\u7684\u5b57\u7b26\u4e32\u5f3a\u8f6c\u4e4b\u540e\u7684\u7ed3\u679c\u4f9d\u7136\u662f\u539f\u5b57\u4e32\u3002\u8fd9\u65f6\u5982\u679c\u5224\u65ad\u6570\u5b57\u662f\u5426\u6709\u6548&#xff0c;\u4f7f\u7528\u7684\u65b9\u5f0f\u4e5f\u662f\u9700\u8981\u5206\u522b\u5bf9\u5f85\u3002\u4e2a\u4eba\u5efa\u8bae\u5e94\u8be5\u5148\u5bf9\u8be5\u539f\u503c\u8fdb\u884c\u6709\u6548\u6027\u5224\u65ad\u4e4b\u540e&#xff0c;\u518d\u8fdb\u884c\u6570\u503c\u7684\u8f6c\u6362&#xff0c;\u518d\u8fdb\u884c\u4e00\u6b21\u6570\u503c\u7684\u6709\u6548\u6027\u5224\u65ad\u3002\u6ce8\u610f&#xff0c;NaN\u7684\u7c7b\u578b\u662fnumber<\/span>\u200b<\/p>\n<p> <img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"224\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260130012456-697c0868cea8f.png\" width=\"439\" \/> <\/p>\n<p>  Log\u8f93\u51fa<\/p>\n<p> <img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"243\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260130012456-697c0868e6ef5.png\" width=\"478\" \/> <\/p>\n<p>  \u8c03\u8bd5\u6001&#xff0c;\u53ef\u770b\u53d8\u91cf\u503c<\/p>\n<h3><span style=\"color:#4da8ee\">4: NaN\u7c7b\u578b\u7684\u5224\u65ad<\/span><\/h3>\n<p>\u5728\u524d\u9762\u7684\u5185\u5bb9\u4e2d\u6709\u90e8\u5206\u5185\u5bb9\u8f6c\u6362\u4e3aNaN&#xff0c;\u5173\u4e8enull\u53caundefined\u7684\u5224\u65ad\u65b9\u5f0f\u662f\u8f83\u57fa\u7840\u7684\u77e5\u8bc6&#xff0c;\u5728\u8fd9\u91cc\u5c31\u4e0d\u4f5c\u8fc7\u591a\u7684\u4ecb\u7ecd&#xff0c;NaN\u7684\u5224\u65ad\u6709\u4e9b\u7279\u6b8a&#xff0c;\u4e0b\u9762\u7684\u4ee3\u7801\u5206\u522b\u4f7f\u7528\u591a\u79cd\u5224\u65ad\u65b9\u5f0f&#xff0c;\u8fdb\u884c\u5bf9\u6bd4\u3002<\/p>\n<p>\/\/ Number_str &#061;&#061; Number.NaN false<br \/>\nif (Number.NaN &#061;&#061; Number.NaN) {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.NaN &#061;&#061; Number.NaN true&#034;);<br \/>\n} else {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.NaN &#061;&#061; Number.NaN false&#034;);<br \/>\n}<\/p>\n<p>\/\/ Number.NaN !&#061;&#061; Number.NaN true<br \/>\nif (Number.NaN !&#061;&#061; Number.NaN) {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.NaN !&#061;&#061; Number.NaN true&#034;);<br \/>\n} else {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.NaN !&#061;&#061; Number.NaN false&#034;);<br \/>\n}<br \/>\n\/\/ Number.NaN !&#061; Number.NaN true<br \/>\nif (Number.NaN !&#061; Number.NaN) {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.NaN !&#061; Number.NaN true&#034;);<br \/>\n} else {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.NaN !&#061; Number.NaN false&#034;);<br \/>\n}<\/p>\n<p>\/\/ Number.isNaN(num) true<br \/>\nif (Number.isNaN(Number_str)) {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.isNaN(num) true&#034;);<br \/>\n} else {<br \/>\n  console.log(&#034;\u4fe9\u6bdb\u8c46 Number.isNaN(num) false&#034;);<br \/>\n} 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