{"id":52039,"date":"2024-12-03T12:14:16","date_gmt":"2024-12-03T04:14:16","guid":{"rendered":"https:\/\/fwq.ai\/blog\/52039\/"},"modified":"2024-12-03T12:14:16","modified_gmt":"2024-12-03T04:14:16","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-react-18-%e7%b1%bb%e7%bb%84%e4%bb%b6%e5%9c%a8%e4%b8%a5%e6%a0%bc%e6%a8%a1%e5%bc%8f%e4%b8%8b%ef%bc%8c%e6%a8%a1%e6%8b%9f%e6%b8%b2%e6%9f%93%e7%9a%84-constructor-%e4%bc%9a-3","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/52039\/","title":{"rendered":"\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f <\/h1>\n<p>\u5c0f\u4f19\u4f34\u4eec\u5bf9\u6587\u7ae0\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300a\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f \u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241118\/1731928545673b21e1605e1.jpg\" class=\"aligncenter\" title=\"\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f\u63d2\u56fe\" alt=\"\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u4e3a\u4ec0\u4e48 React 18 \u7684\u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u4f1a\u6267\u884c\u7684\u6a21\u62df\u6e32\u67d3 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f<\/strong><\/p>\n<p>React 18 \u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u5f15\u5165\u4e86\u4e00\u6b21\u6a21\u62df\u6e32\u67d3\uff0c\u5bfc\u81f4\u7c7b\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u8868\u73b0\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u6a21\u62df\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount<\/li>\n<li>\u9996\u6b21\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount<\/li>\n<\/ol>\n<p>\u8fd9\u5bfc\u81f4\u4e86\u7ec4\u4ef6\u5378\u8f7d\u65f6\u91cd\u7f6e\u4e86\u540e\u7eed\u6e32\u67d3\u7684\u521d\u59cb\u5316\u5bf9\u8c61\uff0c\u5f15\u53d1\u62a5\u9519\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\u5c06\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u653e\u5728 componentDidMount \u5185\u3002<\/li>\n<li>\n<p>\u4f7f\u7528 React \u7684\u65b0\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>getDerivedStateFromProps<\/li>\n<li>getSnapshotBeforeUpdate<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u5c06\u5728\u6bcf\u6b21\u6e32\u67d3\u524d\u8c03\u7528\uff0c\u786e\u4fdd\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u5728\u6bcf\u6b21\u6e32\u67d3\u4e2d\u90fd\u6267\u884c\u3002<\/p>\n<p>\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f \u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n<dl>\n<dt><\/dt>\n<dd>\n   \u7535\u8111PIN\u7801\u600e\u4e48\u89e3\u9664 Win11\u5220\u9664PIN\u7801\u7684\u65b9\u6cd5\u6559\u7a0b\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f \u5c0f\u4f19\u4f34\u4eec\u5bf9\u6587\u7ae0\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300a\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f \u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01 \u4e3a\u4ec0\u4e48 React 18 \u7684\u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u4f1a\u6267\u884c\u7684\u6a21\u62df\u6e32\u67d3 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f React 18 \u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u5f15\u5165\u4e86\u4e00\u6b21\u6a21\u62df\u6e32\u67d3\uff0c\u5bfc\u81f4\u7c7b\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u8868\u73b0\u5982\u4e0b\uff1a \u6a21\u62df\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount \u9996\u6b21\u6e32\u67d3\uff1aconstructor \u2192 componentDidMount \u8fd9\u5bfc\u81f4\u4e86\u7ec4\u4ef6\u5378\u8f7d\u65f6\u91cd\u7f6e\u4e86\u540e\u7eed\u6e32\u67d3\u7684\u521d\u59cb\u5316\u5bf9\u8c61\uff0c\u5f15\u53d1\u62a5\u9519\u3002 \u89e3\u51b3\u65b9\u6848\uff1a \u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a \u5c06\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u653e\u5728 componentDidMount \u5185\u3002 \u4f7f\u7528 React \u7684\u65b0\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff1a getDerivedStateFromProps getSnapshotBeforeUpdate \u8fd9\u4e24\u4e2a\u65b9\u6cd5\u5c06\u5728\u6bcf\u6b21\u6e32\u67d3\u524d\u8c03\u7528\uff0c\u786e\u4fdd\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u5728\u6bcf\u6b21\u6e32\u67d3\u4e2d\u90fd\u6267\u884c\u3002 \u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u4e3a\u4ec0\u4e48 React 18 \u7c7b\u7ec4\u4ef6\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6a21\u62df\u6e32\u67d3\u7684 constructor \u4f1a\u5148\u4e8e\u9996\u6b21\u6e32\u67d3\u7684 componentDidMount \u6267\u884c\uff1f \u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002 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