{"id":30100,"date":"2024-11-25T15:33:58","date_gmt":"2024-11-25T07:33:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/30100\/"},"modified":"2024-11-25T15:33:58","modified_gmt":"2024-11-25T07:33:58","slug":"%e8%af%a6%e8%a7%a3%e5%b0%8f%e7%a8%8b%e5%ba%8f%e5%bc%80%e5%8f%91%e4%b9%8bwxkey","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/30100\/","title":{"rendered":"\u8be6\u89e3\u5c0f\u7a0b\u5e8f\u5f00\u53d1\u4e4bwx:key"},"content":{"rendered":"

\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4ecb\u7ecd\u4e86\u5fae\u4fe1\u5c0f\u7a0b\u5e8f wx:key\u8be6\u7ec6\u4ecb\u7ecd\u7684\u76f8\u5173\u8d44\u6599,\u5e76\u9644\u7b80\u5355\u4ee3\u7801\u5b9e\u4f8b\uff0c\u5e2e\u52a9\u5927\u5bb6\u5b66\u4e60\u7406\u89e3\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e0b<\/p>\n

\u5fae\u4fe1\u5c0f\u7a0b\u5e8f wx:key <\/strong>\u5728\u81ea\u5df1\u5b66\u4e60\u7684\u65f6\u5019\u4e0d\u662f\u591a\u660e\u767d\u5230\u5e95\u662f\u600e\u4e48\u56de\u4e8b\uff0c\u7ecf\u8fc7\u4e0a\u7f51\u67e5\u9605\u8d44\u6599\uff0c\u6574\u7406\u4e0b\uff1a<\/p>\n

  \u4e2a\u4eba\u611f\u89c9\u5b98\u65b9\u7ed9\u51fa\u7684\u4f8b \u5b50\u4e0d\u662f\u5f88\u660e\u786e\uff0c\u5b98\u65b9\u89e3\u91ca\u5982\u4e0b\uff1a<\/p>\n

wx:key<\/strong><\/p>\n

\u5982\u679c\u5217\u8868\u4e2d\u9879\u76ee\u7684\u4f4d\u7f6e\u4f1a\u52a8\u6001\u6539\u53d8\u6216\u8005\u6709\u65b0\u7684\u9879\u76ee\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\uff0c\u5e76\u4e14\u5e0c\u671b\u5217\u8868\u4e2d\u7684\u9879\u76ee\u4fdd\u6301\u81ea\u5df1\u7684\u7279\u5f81\u548c\u72b6\u6001\uff08\u5982 \u4e2d\u7684\u8f93\u5165\u5185\u5bb9\uff0c \u7684\u9009\u4e2d\u72b6\u6001\uff09\uff0c\u9700\u8981\u4f7f\u7528 wx:key \u6765\u6307\u5b9a\u5217\u8868\u4e2d\u9879\u76ee\u7684\u552f\u4e00\u7684\u6807\u8bc6\u7b26\u3002<\/p>\n

wx:key \u7684\u503c\u4ee5\u4e24\u79cd\u5f62\u5f0f\u63d0\u4f9b<\/strong><\/p>\n

\uff0c\u4ee3\u8868\u5728 \u7684 \u4e2d item \u7684\u67d0\u4e2a property\uff0c\u8be5 property \u7684\u503c\u9700\u8981\u662f\u5217\u8868\u4e2d\u552f\u4e00\u7684\u5b57\u7b26\u4e32\u6216\u6570\u5b57\uff0c\u4e14\u4e0d\u80fd\u52a8\u6001\u6539\u53d8\u3002<\/p>\n

\u4fdd\u7559\u5173\u952e\u5b57 *this \u4ee3\u8868\u5728 for \u5faa\u73af\u4e2d\u7684 item \u672c\u8eab\uff0c\u8fd9\u79cd\u8868\u793a\u9700\u8981 item \u672c\u8eab\u662f\u4e00\u4e2a\u552f\u4e00\u7684\u5b57\u7b26\u4e32\u6216\u8005\u6570\u5b57\uff0c\u5982\uff1a<\/p>\n

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\u5982\u4e0d\u63d0\u4f9b wx:key\uff0c\u4f1a\u62a5\u4e00\u4e2a warning\uff0c \u5982\u679c\u660e\u786e\u77e5\u9053\u8be5\u5217\u8868\u662f\uff0c\u6216\u8005\u4e0d\u5fc5\u5173\u6ce8\u5176\u987a\u5e8f\uff0c\u53ef\u4ee5\u9009\u62e9\u5ffd\u7565\u3002<\/p>\n

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<\/p>\n

<switch> {{item.id}} <\/switch><button> Switch <\/button>\r\n<button> Add to the front <\/button>\r\n\r\n<switch> {{item}} <\/switch><button> Add to the front <\/button>\r\nPage({\r\n data: {\r\n  objectArray: [\r\n   {id: 5, unique: 'unique_5'},\r\n   {id: 4, unique: 'unique_4'},\r\n   {id: 3, unique: 'unique_3'},\r\n   {id: 2, unique: 'unique_2'},\r\n   {id: 1, unique: 'unique_1'},\r\n   {id: 0, unique: 'unique_0'},\r\n  ],\r\n  numberArray: [1, 2, 3, 4]\r\n },\r\n switch: function(e) {\r\n  const length = this.data.objectArray.length\r\n  for (let i = 0; i <p>\u8fd9\u91cc\u5199\u4e0b\u4e2a\u4eba\u7684\u7406\u89e3\uff0c\u6709\u4ec0\u4e48\u4e0d\u5bf9\u7684\u5730\u65b9\u5e0c\u671b\u5927\u5bb6\u6307\u6b63\uff1a\u4ee5<switch><\/switch>\u4e3a\u4f8b\uff0c\u5982\u679c\u6ca1\u6709wx:key\uff0c\u9009\u4e2d\u5176\u4e2d\u7684\u67d0\u4e2a<a href=\"http:\/\/www.php.cn\/code\/5991.html\" target=\"_blank\">\u6309\u94ae<\/a>\u7684\u65f6\u5019\uff0c\u6539\u53d8\u5176\u987a\u5e8f \u6216\u6dfb\u52a0\u9009\u9879\u7684\u65f6\uff0c\u9009\u4e2d\u7684\u6309\u94ae\u65f6\u4e0d\u56de\u8ddf\u968f \u4e0a\u4e2a\u6309\u94ae\u6539\u53d8\u987a\u5e8f\u7684\uff0c\u4f1a\u4e00\u76f4\u5728\u56fa\u5b9a\u4f4d\u5b50\uff0c\u5982\u679c\u5982\u679c\u6709wx:key\u5219\u76f8\u53cd\uff0c\u9002\u7528\u4e8e\u5217\u8868\u6216\u5176\u4ed6\u6807\u7b7e\u53ef\u4ee5\u6539\u53d8\u987a\u5e8f\u6216\u6dfb\u52a0\u9879\u76ee\u7684\u60c5\u51b5<\/p><p>\u3010\u76f8\u5173\u63a8\u8350\u3011<\/p><p>1. <a href=\"http:\/\/www.php.cn\/xiazai\/code\/xiaochengxu\" target=\"_self\">\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u5b8c\u6574\u6e90\u7801<\/a><\/p><p>2. <a href=\"http:\/\/www.php.cn\/xiazai\/code\/825\" target=\"_self\">\u8ffd\u683c\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u5e94\u7528\u5546\u5e97<\/a><\/p><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
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