{"id":88444,"date":"2024-04-07T17:30:35","date_gmt":"2024-04-07T09:30:35","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/88444.html"},"modified":"2024-04-07T17:30:36","modified_gmt":"2024-04-07T09:30:36","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8react%e4%b8%ad%e4%bd%bf%e7%94%a8%e9%ab%98%e9%98%b6%e7%bb%84%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/88444.html","title":{"rendered":"\u5982\u4f55\u5728React\u4e2d\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6"},"content":{"rendered":"

\"\u5982\u4f55\u5728React\u4e2d\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\"<\/p>\n

\u5728React\u4e2d\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\uff08HOC\uff09\u7684\u65b9\u6cd5\u5305\u62ec\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u6536\u4e00\u4e2a\u7ec4\u4ef6\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7ec4\u4ef6\u3001\u4f7f\u7528HOC\u6765\u63d0\u4f9b\u989d\u5916\u7684props\u3001\u62bd\u8c61\u72b6\u6001\u7ba1\u7406\u3001\u903b\u8f91\u590d\u7528\u4ee5\u53ca\u6e32\u67d3\u52ab\u6301<\/strong>\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4f7f\u5f97\u9ad8\u9636\u7ec4\u4ef6\u6210\u4e3a\u4e00\u79cd\u5f3a\u5927\u7684\u6a21\u5f0f\uff0c\u4ee5\u4fbf\u5728React\u4e2d\u590d\u7528\u7ec4\u4ef6\u903b\u8f91\u3002\u9ad8\u9636\u7ec4\u4ef6\u6709\u52a9\u4e8e\u5bf9\u7ec4\u4ef6\u8fdb\u884c\u5305\u88f9\u548c\u590d\u5408\uff0c\u4ece\u800c\u5728\u4e0d\u4fee\u6539\u539f\u7ec4\u4ef6\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b\u6269\u5c55\u5176\u529f\u80fd<\/strong>\u3002\u5e38\u89c1\u7684\u9ad8\u9636\u7ec4\u4ef6\u7528\u4f8b\u5305\u62ec\u8fde\u63a5\u5230Redux\u7684connect<\/code>\u51fd\u6570\u3001\u4e0eReact Router\u7684withRouter<\/code>\uff0c\u4ee5\u53ca\u6570\u636e\u83b7\u53d6\u7ec4\u4ef6\u7b49\u3002\u4e3a\u4e86\u6df1\u5165\u7406\u89e3\u8fd9\u4e2a\u6982\u5ff5\uff0c\u6211\u4eec\u5c06\u9010\u6b65\u63a2\u8ba8\u5982\u4f55\u5728React\u5e94\u7528\u4e2d\u521b\u5efa\u548c\u4f7f\u7528HOC\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u7406\u89e3\u9ad8\u9636\u7ec4\u4ef6<\/h3>\n<\/p>\n

\u9ad8\u9636\u7ec4\u4ef6\uff08HOC\uff09\u662fReact\u4e2d\u7528\u4e8e\u91cd\u7528\u7ec4\u4ef6\u903b\u8f91\u7684\u9ad8\u7ea7\u6280\u672f<\/strong>\u3002\u5b83\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u5176\u53c2\u6570\u4e3a\u4e00\u4e2a\u7ec4\u4ef6\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u7ecf\u8fc7\u589e\u5f3a\u7684\u7ec4\u4ef6\u3002\u9ad8\u9636\u7ec4\u4ef6\u7684\u4f5c\u7528\u7c7b\u4f3c\u4e8e\u9ad8\u9636\u51fd\u6570\uff0c\u80fd\u591f\u63a5\u6536\u51fd\u6570\u4e3a\u53c2\u6570\u6216\u8005\u5c06\u51fd\u6570\u4f5c\u4e3a\u8f93\u51fa\u3002<\/p>\n<\/p>\n

\u6982\u5ff5\u4ecb\u7ecd<\/h4>\n<\/p>\n

\u5728\u7ee7\u7eed\u63a2\u7d22\u5982\u4f55\u5b9e\u73b0HOC\u4e4b\u524d\uff0c\u9996\u5148\u4e86\u89e3\u5176\u57fa\u672c\u6982\u5ff5\u3002\u9ad8\u9636\u7ec4\u4ef6\u4e0d\u662fReact API\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u662f\u4e00\u79cd\u57fa\u4e8eReact\u7684\u7ec4\u5408\u7279\u6027\u800c\u5f62\u6210\u7684\u8bbe\u8ba1\u6a21\u5f0f<\/strong>\u3002\u8fd9\u610f\u5473\u7740HOC\u662f\u4eceReact\u81ea\u8eab\u7684\u7ec4\u4ef6\u7ee7\u627f\u548c\u7ec4\u5408\u529f\u80fd\u884d\u751f\u51fa\u6765\u7684\u4e00\u79cd\u6a21\u5f0f\u3002<\/p>\n<\/p>\n

\u57fa\u672c\u5b9e\u73b0<\/h4>\n<\/p>\n

\u9ad8\u9636\u7ec4\u4ef6\u7684\u57fa\u672c\u5b9e\u73b0\u6d89\u53ca\u5230JavaScript\u7684\u51fd\u6570\u7f16\u7a0b\uff0c\u5c24\u5176\u662f\u4f7f\u7528\u51fd\u6570\u8fd4\u56de\u53e6\u4e00\u4e2a\u51fd\u6570\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f20\u9012\u7ec4\u4ef6\u5230\u4e00\u4e2a\u51fd\u6570\uff0c\u5e76\u5f97\u5230\u4e00\u4e2a\u65b0\u7684\u589e\u5f3a\u7ec4\u4ef6\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u521b\u5efa\u4e00\u4e2a\u9ad8\u9636\u7ec4\u4ef6<\/h3>\n<\/p>\n

\u521b\u5efa\u9ad8\u9636\u7ec4\u4ef6\u6d89\u53ca\u5230\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u5c06\u8981\u5305\u88f9\u7684\u7ec4\u4ef6\u4f5c\u4e3a\u5176\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u3001\u589e\u5f3a\u529f\u80fd\u7684\u7ec4\u4ef6\u3002<\/p>\n<\/p>\n

\u51fd\u6570\u5b9a\u4e49<\/h4>\n<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u9ad8\u9636\u7ec4\u4ef6\u7684\u4f8b\u5b50\u3002\u8fd9\u4e2aHOC\u63a5\u6536\u4e00\u4e2a\u7ec4\u4ef6WrappedComponent<\/code>\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u989d\u5916\u903b\u8f91\u7684\u65b0\u7ec4\u4ef6\uff1a<\/p>\n<\/p>\n

function withExtraFunctionality(WrappedComponent) {<\/p>\n
  return class extends React.Component {<\/p>\n
    render() {<\/p>\n
      return <WrappedComponent {...this.props} \/>;<\/p>\n
    }<\/p>\n
  };<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
HOC\u5229\u7528\u4e86React\u7684\u7ec4\u4ef6\u5316\u7279\u6027\uff0c\u4f7f\u5f97\u903b\u8f91\u7684\u590d\u7528\u53d8\u5f97\u5bb9\u6613\u800c\u7075\u6d3b<\/strong>\u3002<\/p>\n<\/p>\n
\u5e94\u7528\u589e\u5f3a\u529f\u80fd<\/h4>\n<\/p>\n
\u901a\u5e38\uff0c\u9ad8\u9636\u7ec4\u4ef6\u4f1a\u589e\u52a0\u989d\u5916\u7684props\uff0c\u6216\u8005\u5728\u7ec4\u4ef6\u4e4b\u95f4\u5171\u4eab\u72b6\u6001\uff0c\u6216\u8005\u5bf9\u751f\u547d\u5468\u671f\u4e8b\u4ef6\u505a\u51fa\u54cd\u5e94\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u8fd4\u56de\u7684\u7c7b\u4e2d\u5b9e\u73b0\u8fd9\u4e9b\u7279\u6027\uff1a<\/p>\n<\/p>\n
function withExtraFunctionality(WrappedComponent) {<\/p>\n
  return class extends React.Component {<\/p>\n
    \/\/ \u53ef\u4ee5\u5728\u8fd9\u91cc\u589e\u52a0\u989d\u5916\u72b6\u6001\u548c\u903b\u8f91<\/p>\n
    componentDidMount() {<\/p>\n
      \/\/ \u751f\u547d\u5468\u671f\u7ba1\u7406<\/p>\n
    }<\/p>\n
    render() {<\/p>\n
      return <WrappedComponent {...this.props} \/>;<\/p>\n
    }<\/p>\n
  };<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528HOC\u7684\u76ee\u7684\u4e4b\u4e00\u5c31\u662f\u5c06\u590d\u7528\u7684\u903b\u8f91\u96c6\u4e2d\u5728\u4e00\u4e2a\u5730\u65b9\uff0c\u6539\u5584\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u8bfb\u6027<\/strong>\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u589e\u5f3a\u73b0\u6709\u7ec4\u4ef6<\/h3>\n<\/p>\n
\u9ad8\u9636\u7ec4\u4ef6\u7684\u5f3a\u5927\u4e4b\u5904\u5728\u4e8e\u5b83\u53ef\u4ee5\u7b80\u5355\u5730\u5e94\u7528\u4e8e\u4efb\u4f55\u73b0\u6709\u7ec4\u4ef6\uff0c\u4ee5\u63d0\u4f9b\u9644\u52a0\u7684\u529f\u80fd\u6216\u6570\u636e\u3002<\/p>\n<\/p>\n
\u5b9e\u65bd\u4e3e\u4f8b<\/h4>\n<\/p>\n
\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u9700\u8981\u88ab\u589e\u5f3a\u529f\u80fd\u7684\u7ec4\u4ef6MyComponent<\/code>\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\uff1a<\/p>\n<\/p>\n
const EnhancedComponent = withExtraFunctionality(MyComponent);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b64\u65f6\uff0cEnhancedComponent<\/code>\u662f\u7ecf\u8fc7\u589e\u5f3a\u7684\u65b0\u7ec4\u4ef6\uff0c\u62e5\u6709\u4e86withExtraFunctionality<\/code>\u6240\u63d0\u4f9b\u7684\u4efb\u4f55\u989d\u5916\u903b\u8f91\u548c\u6570\u636e<\/strong>\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u589e\u5f3a\u7ec4\u4ef6<\/h4>\n<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u5728React\u7684JSX\u4e2d\u76f4\u63a5\u4f7f\u7528EnhancedComponent<\/code>\uff0c\u5c31\u50cf\u4f7f\u7528\u4efb\u4f55\u5176\u4ed6React\u7ec4\u4ef6\u4e00\u6837\uff1a<\/p>\n<\/p>\n
function App() {<\/p>\n
  return (<\/p>\n
    <div><\/p>\n
      <EnhancedComponent someProp="value" \/><\/p>\n
    <\/div><\/p>\n
  );<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u9ad8\u9636\u7ec4\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u4e3aMyComponent<\/code>\u6ce8\u5165\u65b0\u7684props\u548c\u903b\u8f91\uff0c\u800c\u4e0d\u9700\u8981\u66f4\u6539\u5176\u539f\u59cb\u4ee3\u7801<\/strong>\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5904\u7406\u9ad8\u9636\u7ec4\u4ef6\u7684props<\/h3>\n<\/p>\n
\u7531\u4e8e\u9ad8\u9636\u7ec4\u4ef6\u662f\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\u6267\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u5305\u62ec\u5bf9\u4f20\u9012\u7ed9\u88ab\u5305\u88f9\u7ec4\u4ef6\u7684props\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<\/p>\n
\u7ee7\u627fprops<\/h4>\n<\/p>\n
\u5728\u8fd4\u56de\u7684\u589e\u5f3a\u7ec4\u4ef6\u6e32\u67d3\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u5e94\u786e\u4fdd\u5c06props\u4f20\u9012\u7ed9\u88ab\u5305\u88f9\u7684\u7ec4\u4ef6\u3002\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1\u589e\u5f3a\u7ec4\u4ef6\u80fd\u591f\u63a5\u6536\u5916\u90e8\u4f20\u6765\u7684props\uff1a<\/p>\n<\/p>\n
render() {<\/p>\n
  \/\/ \u5c06\u989d\u5916\u7684props\u52a0\u5165\u5230\u539f\u6709\u7684props<\/p>\n
  const extraProps = { extraData: 'someExtraData' };<\/p>\n
  return <WrappedComponent {...this.props} {...extraProps} \/>;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
HOC\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u5411\u7ec4\u4ef6\u6dfb\u52a0\u989d\u5916\u7684props\u6216\u4fee\u6539\u8fd9\u4e9bprops<\/strong>\u3002<\/p>\n<\/p>\n
\u5c5e\u6027\u4ee3\u7406<\/h4>\n<\/p>\n
\u5c5e\u6027\u4ee3\u7406\u662f\u4e00\u79cd\u5728HOC\u4e2d\u64cd\u4f5c\u7ec4\u4ef6props\u7684\u6280\u672f\u3002\u901a\u8fc7\u5c5e\u6027\u4ee3\u7406\uff0c\u53ef\u4ee5\u5728\u9ad8\u9636\u7ec4\u4ef6\u4e2d\u8bfb\u53d6\u3001\u6dfb\u52a0\u3001\u7f16\u8f91\u6216\u5220\u9664\u88ab\u4f20\u5165\u7ec4\u4ef6\u7684props\uff0c\u4ee5\u589e\u5f3a\u7ec4\u4ef6\u529f\u80fd\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u62bd\u8c61\u548c\u590d\u7528\u72b6\u6001\u903b\u8f91<\/h3>\n<\/p>\n
HOC\u7279\u522b\u9002\u4e8e\u62bd\u8c61\u7ec4\u4ef6\u7684\u72b6\u6001\u7ba1\u7406\u903b\u8f91\uff0c\u4f7f\u5f97\u76f8\u540c\u903b\u8f91\u53ef\u4ee5\u5728\u591a\u4e2a\u7ec4\u4ef6\u95f4\u5171\u4eab\u4f7f\u7528<\/strong>\u3002<\/p>\n<\/p>\n
\u72b6\u6001\u62bd\u8c61<\/h4>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u72b6\u6001\u62bd\u8c61\u7684\u4f8b\u5b50\uff0c\u5b9e\u73b0\u4e86\u4e00\u4e2a\u590d\u7528\u7684\u8f93\u5165\u5904\u7406\u903b\u8f91\u7684\u9ad8\u9636\u7ec4\u4ef6\uff1a<\/p>\n<\/p>\n
function withControlledState(WrappedComponent) {<\/p>\n
  return class extends React.Component {<\/p>\n
    constructor(props) {<\/p>\n
      super(props);<\/p>\n
      this.state = {<\/p>\n
        value: ''<\/p>\n
      };<\/p>\n
    }<\/p>\n
    handleChange = (event) => {<\/p>\n
      this.setState({ value: event.target.value });<\/p>\n
    }<\/p>\n
    render() {<\/p>\n
      return (<\/p>\n
        <WrappedComponent<\/p>\n
          value={this.state.value}<\/p>\n
          onChange={this.handleChange}<\/p>\n
          {...this.props}<\/p>\n
        \/><\/p>\n
      );<\/p>\n
    }<\/p>\n
  };<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2aHOC\u5b9e\u73b0\u4e86\u8868\u5355\u8f93\u5165\u7684\u53d7\u63a7\u7ec4\u4ef6\u72b6\u6001\u7ba1\u7406\uff0c\u5e76\u4e14\u53ef\u4ee5\u88ab\u4efb\u4f55\u9700\u8981\u76f8\u540c\u529f\u80fd\u7684\u7ec4\u4ef6\u91cd\u7528<\/strong>\u3002<\/p>\n<\/p>\n
\u72b6\u6001\u590d\u7528<\/h4>\n<\/p>\n
\u901a\u8fc7\u4e0a\u8ff0HOC\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u7ec4\u4ef6\u7684\u5b9e\u4f8b\uff0c\u6bcf\u4e2a\u5b9e\u4f8b\u90fd\u6709\u81ea\u5df1\u72ec\u7acb\u7684\u53d7\u63a7\u72b6\u6001\uff0c\u800c\u4e0d\u9700\u8981\u5728\u6bcf\u4e2a\u7ec4\u4ef6\u4e2d\u5355\u72ec\u5b9e\u73b0\u76f8\u540c\u7684\u8868\u5355\u5904\u7406\u903b\u8f91\u3002\u8fd9\u6781\u5927\u5730\u7b80\u5316\u4e86\u72b6\u6001\u7ba1\u7406\uff0c\u5e76\u63d0\u9ad8\u4e86\u4ee3\u7801\u590d\u7528\u6027\u3002<\/p>\n<\/p>\n
const ControlledInput = withControlledState('input');<\/p>\n
const ControlledTextArea = withControlledState('textarea');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u5c06\u72b6\u6001\u7ba1\u7406\u903b\u8f91\u62bd\u8c61\u5230HOC\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u8f7b\u677e\u7ba1\u7406\u4e0d\u540c\u7c7b\u578b\u8868\u5355\u7684\u7ec4\u4ef6\uff0c\u800c\u65e0\u9700\u91cd\u590d\u4ee3\u7801<\/strong>\u3002<\/p>\n<\/p>\n
\u516d\u3001\u903b\u8f91\u590d\u7528\u548c\u53cd\u5411\u7ee7\u627f<\/h3>\n<\/p>\n
\u9ad8\u9636\u7ec4\u4ef6\u4e0d\u4ec5\u53ef\u4ee5\u901a\u8fc7\u5c5e\u6027\u4ee3\u7406\u7684\u65b9\u5f0f\u8fdb\u884c\u903b\u8f91\u590d\u7528\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u53cd\u5411\u7ee7\u627f\uff08Inheritance Inversion\uff09\u7684\u6280\u672f\u6765\u5b9e\u73b0\u66f4\u6df1\u5c42\u6b21\u7684\u903b\u8f91\u590d\u7528\u3002<\/p>\n<\/p>\n
\u53cd\u5411\u7ee7\u627f\u57fa\u7840<\/h4>\n<\/p>\n
\u53cd\u5411\u7ee7\u627f\u662f\u4e00\u79cd\u9ad8\u9636\u7ec4\u4ef6\u6280\u672f\uff0c\u5176\u4e2d\u8fd4\u56de\u7684\u7c7b\u76f4\u63a5\u7ee7\u627f\u81ea\u4f20\u5165\u7684\u7ec4\u4ef6\u3002\u8fd9\u5141\u8bb8HOC\u4ecb\u5165\u5e76\u5e72\u9884\u7ec4\u4ef6\u7684\u6e32\u67d3\u903b\u8f91\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u591a\u63a7\u5236\u3002<\/p>\n<\/p>\n
function withInheritanceInversion(WrappedComponent) {<\/p>\n
  return class extends WrappedComponent {<\/p>\n
    render() {<\/p>\n
      \/\/ \u53ef\u4ee5\u901a\u8fc7 super.render() \u83b7\u53d6WrappedComponent\u7684\u6e32\u67d3\u7ed3\u679c<\/p>\n
      return super.render();<\/p>\n
    }<\/p>\n
  };<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u6280\u672f\u5141\u8bb8HOC\u7ee7\u627f\u5e76\u6269\u5c55\u4f20\u5165\u7ec4\u4ef6\u7684\u529f\u80fd\uff0c\u4f46\u5b83\u4e0d\u5e38\u7528\uff0c\u56e0\u4e3a\u5b83\u5f15\u5165\u4e86\u66f4\u9ad8\u7684\u8026\u5408\u5ea6\u548c\u590d\u6742\u6027<\/strong>\u3002<\/p>\n<\/p>\n
\u5b8c\u5168\u63a7\u5236\u6e32\u67d3\u903b\u8f91<\/h4>\n<\/p>\n
\u53cd\u5411\u7ee7\u627f\u7ed9\u4e88HOC\u5b8c\u5168\u63a7\u5236WrappedComponent\u7684\u6e32\u67d3\u903b\u8f91\uff0c\u751a\u81f3\u53ef\u4ee5\u62e6\u622a\u548c\u4fee\u6539\u5176\u6e32\u67d3\u8f93\u51fa\u3002\u8fd9\u5f3a\u5927\u7684\u529f\u80fd\u53ef\u4ee5\u7528\u4e8e\u590d\u7528\u975e\u5e38\u8be6\u5c3d\u7684UI\u903b\u8f91\uff0c\u6216\u8005\u5176\u4ed6\u9700\u8981\u6df1\u5165\u4ecb\u5165\u7ec4\u4ef6\u5185\u90e8\u7684\u573a\u5408\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u7684\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n
\u867d\u7136\u9ad8\u9636\u7ec4\u4ef6\u975e\u5e38\u5f3a\u5927\uff0c\u4f46\u4f7f\u7528\u5b83\u4eec\u4e5f\u5e94\u9075\u5faa\u67d0\u4e9b\u6700\u4f73\u5b9e\u8df5\u6765\u907f\u514d\u5e38\u89c1\u7684\u9677\u9631\u3002<\/p>\n<\/p>\n
\u547d\u540d\u7ea6\u5b9a<\/h4>\n<\/p>\n
\u4fdd\u6301\u4e00\u81f4\u7684\u547d\u540d\u7ea6\u5b9a\u6709\u52a9\u4e8e\u533a\u5206\u666e\u901a\u7ec4\u4ef6\u548c\u9ad8\u9636\u7ec4\u4ef6\u3002\u901a\u5e38\u4ee5with<\/code>\u524d\u7f00\u547d\u540dHOC\uff0c\u5982withRouter<\/code>\u3001withRedux<\/code>\u7b49\u3002<\/p>\n<\/p>\n
\u9759\u6001\u65b9\u6cd5\u590d\u5236<\/h4>\n<\/p>\n
\u5982\u679c\u539f\u59cb\u7ec4\u4ef6\u6709\u9759\u6001\u65b9\u6cd5\uff0c\u5728HOC\u4e2d\u5e94\u8be5\u6b63\u786e\u590d\u5236\u8fd9\u4e9b\u65b9\u6cd5\u5230\u8fd4\u56de\u7684\u7ec4\u4ef6\u4e0a\uff0c\u5426\u5219\u8fd9\u4e9b\u65b9\u6cd5\u5c06\u4e22\u5931\u3002<\/p>\n<\/p>\n
\u5c5e\u6027\u900f\u4f20<\/h4>\n<\/p>\n
HOC\u5e94\u8be5\u5c06\u975e\u7279\u5b9a\u7684props\u5411\u4e0b\u4f20\u9012\u7ed9\u5305\u88f9\u7684\u7ec4\u4ef6\uff0c\u786e\u4fdd\u5305\u88f9\u7684\u7ec4\u4ef6\u53ef\u4ee5\u8bbf\u95ee\u5230\u5fc5\u8981\u7684props\u3002<\/p>\n<\/p>\n
\u4e0d\u8981\u5728\u7ec4\u4ef6\u7684render\u65b9\u6cd5\u4e2d\u4f7f\u7528HOC<\/h4>\n<\/p>\n
\u521b\u5efaHOC\u901a\u5e38\u5e94\u8be5\u5728\u7ec4\u4ef6\u5916\u90e8\u6267\u884c\uff0c\u800c\u4e0d\u662f\u5728\u7ec4\u4ef6\u7684render\u65b9\u6cd5\u5185\u90e8\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4\u7ec4\u4ef6\u72b6\u6001\u7684\u4e0d\u5fc5\u8981\u91cd\u7f6e\u548c\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<\/p>\n
\u5305\u88c5\u663e\u793a\u540d\u79f0\u4ee5\u65b9\u4fbf\u8c03\u8bd5<\/h4>\n<\/p>\n
\u4e3a\u4e86\u4fbf\u4e8e\u8c03\u8bd5\uff0c\u9ad8\u9636\u7ec4\u4ef6\u5e94\u8be5\u4fee\u6539\u589e\u5f3a\u7ec4\u4ef6\u7684displayName<\/code>\u5c5e\u6027\uff0c\u4ee5\u53cd\u6620HOC\u7684\u4f7f\u7528\u3002<\/p>\n<\/p>\n
\u516b\u3001\u7ed3\u8bba<\/h3>\n<\/p>\n
\u9ad8\u9636\u7ec4\u4ef6\u4e0d\u4ec5\u662fReact\u5f3a\u5927\u7684\u6a21\u5f0f\uff0c\u4e3a\u7ec4\u4ef6\u903b\u8f91\u590d\u7528\u63d0\u4f9b\u4e86\u4f18\u96c5\u89e3\u51b3\u65b9\u6848\uff0c\u4e5f\u662f\u6784\u5efa\u5927\u578b\u3001\u53ef\u7ef4\u62a4React\u5e94\u7528\u7684\u57fa\u7840\u3002HOC\u80fd\u591f\u589e\u5f3a\u7ec4\u4ef6\u529f\u80fd\uff0c\u8ba9\u5f00\u53d1\u8005\u80fd\u591f\u4ee5\u4e00\u79cdD.R.Y\uff08Don't Repeat Yourself\uff09\u7684\u65b9\u5f0f\u6784\u5efa\u754c\u9762\u3002\u7406\u89e3\u548c\u719f\u7ec3\u8fd0\u7528\u9ad8\u9636\u7ec4\u4ef6\uff0c\u5c06\u52a9\u529b\u4e8e\u6253\u9020\u66f4\u52a0\u6a21\u5757\u5316\u3001\u7075\u6d3b\u548c\u6e05\u6670\u7684React\u5e94\u7528\u3002<\/p>\n<\/p>\n
\u7efc\u4e0a\uff0c\u9ad8\u9636\u7ec4\u4ef6\u901a\u8fc7\u5c01\u88c5\u548c\u590d\u7528\u7ec4\u4ef6\u903b\u8f91\uff0c\u63d0\u5347\u4e86React\u5f00\u53d1\u4e2d\u7684\u6548\u7387\u548c\u4ee3\u7801\u7684\u53ef\u7ba1\u7406\u6027\uff0c\u5e76\u4e3a\u5904\u7406\u8de8\u7ec4\u4ef6\u7684\u5171\u4eab\u903b\u8f91\u63d0\u4f9b\u4e86\u4e00\u79cd\u5f3a\u5927\u7684\u6a21\u5f0f<\/strong>\u3002\u968f\u7740\u5e94\u7528\u7684\u903b\u8f91\u53d8\u5f97\u590d\u6742\uff0c\u9ad8\u9636\u7ec4\u4ef6\u5728\u73b0\u4ee3React\u5e94\u7528\u5f00\u53d1\u4e2d\u626e\u6f14\u4e86\u8d8a\u6765\u8d8a\u91cd\u8981\u7684\u89d2\u8272\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u4ec0\u4e48\u662f\u9ad8\u9636\u7ec4\u4ef6\uff1f\u5982\u4f55\u5728React\u4e2d\u4f7f\u7528\uff1f<\/strong><\/p>\n
    \n
  • \u9ad8\u9636\u7ec4\u4ef6(Higher-Order Component, HOC)\u662f\u4e00\u79cd\u7528\u4e8e\u589e\u5f3a\u7ec4\u4ef6\u529f\u80fd\u7684\u9ad8\u7ea7\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u63a5\u53d7\u4e00\u4e2a\u7ec4\u4ef6\u4f5c\u4e3a\u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u589e\u5f3a\u7ec4\u4ef6\u3002\u5728React\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u6765\u5b9e\u73b0\u4ee3\u7801\u7684\u590d\u7528\u548c\u903b\u8f91\u7684\u5c01\u88c5\u3002<\/li>\n
  • \u5728React\u4e2d\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\n
      \n
    • \u521b\u5efa\u4e00\u4e2a\u9ad8\u9636\u7ec4\u4ef6\u51fd\u6570\uff0c\u63a5\u53d7\u4e00\u4e2a\u88ab\u5305\u88f9\u7684\u7ec4\u4ef6\u4f5c\u4e3a\u53c2\u6570\u3002<\/li>\n
    • \u5728\u9ad8\u9636\u7ec4\u4ef6\u5185\u90e8\uff0c\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ec4\u4ef6\u5e76\u8fd4\u56de\uff0c\u53ef\u4ee5\u5728\u8fd9\u4e2a\u7ec4\u4ef6\u4e2d\u589e\u52a0\u989d\u5916\u7684\u529f\u80fd\u6216\u903b\u8f91\u3002<\/li>\n
    • \u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u6765\u5305\u88f9\u9700\u8981\u589e\u5f3a\u529f\u80fd\u7684\u7ec4\u4ef6\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u9ad8\u9636\u7ec4\u4ef6\u5e76\u4f20\u5165\u539f\u59cb\u7ec4\u4ef6\u4f5c\u4e3a\u53c2\u6570\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
      2. \u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\uff1f\u6709\u4ec0\u4e48\u597d\u5904\uff1f<\/strong><\/p>\n
        \n
      • \u9ad8\u9636\u7ec4\u4ef6\u63d0\u4f9b\u4e86\u4e00\u79cd\u4f18\u96c5\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u7ec4\u4ef6\u4ee3\u7801\u7684\u590d\u7528\u548c\u903b\u8f91\u7684\u5c01\u88c5\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7ec4\u7ec7\u548c\u7ba1\u7406React\u5e94\u7528\u7684\u4ee3\u7801\u3002<\/li>\n
      • \u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u53ef\u4ee5\u5c06\u4e0e\u4e1a\u52a1\u65e0\u5173\u7684\u903b\u8f91\u63d0\u53d6\u51fa\u6765\uff0c\u4f7f\u7ec4\u4ef6\u66f4\u52a0\u4e13\u6ce8\u4e8e\u81ea\u8eab\u7684\u6838\u5fc3\u529f\u80fd\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n
      • \u9ad8\u9636\u7ec4\u4ef6\u8fd8\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u6a2a\u5207\u5173\u6ce8\u70b9(\u5982\u65e5\u5fd7\u8bb0\u5f55\u3001\u6388\u6743\u9a8c\u8bc1\u7b49)\u7684\u529f\u80fd\uff0c\u5728\u6574\u4e2a\u5e94\u7528\u4e2d\u7edf\u4e00\u7ba1\u7406\u548c\u5e94\u7528\u8fd9\u4e9b\u6a2a\u5207\u5173\u6ce8\u70b9\u7684\u903b\u8f91\u3002<\/li>\n
      • \u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u8fd8\u53ef\u4ee5\u5b9e\u73b0\u7ec4\u4ef6\u7684\u590d\u7528\uff0c\u5f53\u591a\u4e2a\u7ec4\u4ef6\u9700\u8981\u76f8\u540c\u7684\u529f\u80fd\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u529f\u80fd\u5c01\u88c5\u6210\u9ad8\u9636\u7ec4\u4ef6\uff0c\u5728\u9700\u8981\u7684\u5730\u65b9\u76f4\u63a5\u4f7f\u7528\u3002<\/li>\n<\/ul>\n
        3. \u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u65f6\u9700\u8981\u6ce8\u610f\u54ea\u4e9b\u95ee\u9898\uff1f<\/strong><\/p>\n
          \n
        • \u5728\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u7684\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u6ce8\u610f\u4e00\u4e9b\u95ee\u9898\uff1a\n
            \n
          • \u9ad8\u9636\u7ec4\u4ef6\u4e0d\u5e94\u8be5\u4fee\u6539\u4f20\u5165\u7684\u7ec4\u4ef6\uff0c\u800c\u662f\u901a\u8fc7\u7ee7\u627f\u6216\u7ec4\u5408\u7684\u65b9\u5f0f\u6765\u589e\u52a0\u529f\u80fd\u3002<\/li>\n
          • \u9ad8\u9636\u7ec4\u4ef6\u7684\u540d\u79f0\u4ee5With\u5f00\u5934\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u547d\u540d\u89c4\u8303\uff0c\u53ef\u4ee5\u5f88\u660e\u786e\u5730\u8868\u660e\u8be5\u7ec4\u4ef6\u662f\u4e00\u4e2a\u9ad8\u9636\u7ec4\u4ef6\u3002<\/li>\n
          • \u5728\u5c06props\u4f20\u9012\u7ed9\u88ab\u5305\u88f9\u7ec4\u4ef6\u65f6\uff0c\u9700\u8981\u4f7f\u7528{...props}<\/code>\u7684\u65b9\u5f0f\u6765\u4f20\u9012\uff0c\u4ee5\u4fdd\u8bc1\u88ab\u5305\u88f9\u7ec4\u4ef6\u53ef\u4ee5\u63a5\u6536\u5230\u6240\u6709\u7684props\u3002<\/li>\n
          • \u9ad8\u9636\u7ec4\u4ef6\u4e5f\u53ef\u4ee5\u63a5\u53d7\u4e00\u4e9b\u914d\u7f6e\u53c2\u6570\uff0c\u7528\u4e8e\u63a7\u5236\u589e\u52a0\u7684\u529f\u80fd\u6216\u903b\u8f91\u3002<\/li>\n
          • \u5728\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u7ec4\u4ef6\u7684\u6027\u80fd\u95ee\u9898\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u91cd\u590d\u6e32\u67d3\u548c\u66f4\u65b0\u3002\u53ef\u4ee5\u4f7f\u7528React.memo\u7b49\u6280\u672f\u6765\u4f18\u5316\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"\u5728React\u4e2d\u4f7f\u7528\u9ad8\u9636\u7ec4\u4ef6\uff08HOC\uff09\u7684\u65b9\u6cd5\u5305\u62ec\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u6536\u4e00\u4e2a\u7ec4\u4ef6\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7ec4\u4ef6\u3001\u4f7f\u7528HOC\u6765\u63d0 […]","protected":false},"author":3,"featured_media":88445,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/88444"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=88444"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/88444\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/88445"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=88444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=88444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=88444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}