{"id":38854,"date":"2023-03-29T01:46:54","date_gmt":"2024-01-23T20:44:31","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/angular%e7%9a%84%e6%96%b0%e6%9c%aa%e6%9d%a5%ef%bc%9a%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8signals%e6%9d%a5%e5%ae%9e%e8%b7%b5%e5%ae%83\/"},"modified":"2024-04-29T20:56:05","modified_gmt":"2024-04-29T12:56:05","slug":"angular%e7%9a%84%e6%96%b0%e6%9c%aa%e6%9d%a5%ef%bc%9a%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8signals%e6%9d%a5%e5%ae%9e%e8%b7%b5%e5%ae%83","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/angular%e7%9a%84%e6%96%b0%e6%9c%aa%e6%9d%a5%ef%bc%9a%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8signals%e6%9d%a5%e5%ae%9e%e8%b7%b5%e5%ae%83\/","title":{"rendered":"Angular\u7684\u65b0\u672a\u6765\uff1a\u5c1d\u8bd5\u4f7f\u7528Signals\u6765\u5b9e\u8df5\u5b83"},"content":{"rendered":"

\u55e8\uff01\u5965\u65af\u6c40\u4f60\u597d\u5417\uff1f\u55ef\uff0c\u4f60\u5e72\u561b\u5462\uff1f<\/p>\n

\u6982\u8ff0<\/h1>\n

\u6211\u5c06\u4ecb\u7ecd\u4e00\u4e9b\u4f7f\u7528 Angular 16 \u4e2d\u9884\u8ba1\u5305\u542b\u7684\u65b0\u539f\u59cb\u4fe1\u53f7\u7684\u5177\u4f53\u793a\u4f8b\uff01<\/p>\n

\u4fe1\u53f7\u662f\u4ec0\u4e48\uff1f<\/h2>\n

\u8fd9\u662fAngular\u6846\u67b6\u4e3a\u4e86\u9ad8\u6548\u68c0\u6d4b\u53d8\u66f4\u800c\u5f15\u5165\u7684\u65b0\u7684\u54cd\u5e94\u6027\u539f\u8bed\u3002<\/p>\n

SolidJS\u7684signal\u4e0e\u6982\u5ff5\u662f\u76f8\u540c\u7684\uff0c\u975e\u5e38\u7b80\u5355\u3002 Signal\u5177\u6709\u4ee5\u4e0b\u4e24\u4e2a\u7279\u70b9\u3002<\/p>\n

SolidJS\u7684\u4fe1\u53f7\u4e0e\u6982\u5ff5\u76f8\u540c\uff0c\u5e76\u4e14\u975e\u5e38\u7b80\u5355\u3002Signal\u5177\u6709\u4ee5\u4e0b\u4e24\u4e2a\u7279\u5f81\u3002<\/p>\n

    \n
  1. \n
      \u5177\u6709\u4fdd\u6301\u6570\u503c\u7684\u80fd\u529b<\/ol>\n<\/li>\n<\/ol>\n

       <\/p>\n

        \u5177\u6709\u5728\u6570\u503c\u53d1\u751f\u53d8\u5316\u65f6\u53d1\u51fa\u4fe1\u53f7\u7684\u80fd\u529b<\/ol>\n

        \u5c06\u4e0a\u8ff0\u7684\u4e24\u4e2a\u7279\u70b9\u5e94\u7528\u4e8eAngular\uff0c\u5c31\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06\u540c\u6b65\u5904\u7406\u53cd\u6620\u5230\u6a21\u677f\u4e2d\u3002<\/p>\n

        \u8bf7\u9605\u8bfb\u4ee5\u4e0b\u6587\u7ae0\u4ee5\u4e86\u89e3\u6709\u5173Signal\u548cAngular\u53d8\u66f4\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n

         <\/p>\n

        \u4ee5\u8bd5\u9a8c\u6027\u4f7f\u7528Signal API\u7684\u65b9\u6cd5<\/h1>\n

        \u5982\u679c\u6709\u4eba\u4ecd\u7136\u60f3\u8981\u4f7f\u7528Signal\uff01\u5b9e\u9645\u4e0a\uff0cAngular\u56e2\u961f\u5df2\u7ecf\u5c06\u5176\u4f5c\u4e3aPOC\u5b9e\u65bd\u5e76\u53d1\u5e03\u4e86\uff01<\/p>\n

        \u8981\u4f7f\u7528@angular\/cli@16.0.0\uff0c\u5fc5\u987b\u4f7f\u7528\u5b83\u3002<\/p>\n

        \u7531\u4e8e\u7248\u672c\u7ecf\u5e38\u8bd5\u9a8c\u6027\u5730\u66f4\u6539\uff0c\u6240\u4ee5\u8bf7\u901a\u8fc7npm\u6765\u786e\u8ba4\u5f53\u524d\u6700\u65b0\u7248\u672c\u3002<\/p>\n

         <\/p>\n

        \u4ece\u4e0a\u9762\u7684npm\u9875\u9762\u83b7\u53d6\u6700\u65b0\u7248\u672c\u540e\uff0c\u5c06\u5176\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\u5e76\u6267\u884c\uff0c\u5373\u53ef\u521b\u5efa\u4e00\u4e2aAngular 16\u9879\u76ee\u3002<\/p>\n

        npx -p @angular\/cli@16.0.0-next.6 ng new signals-play\r\n<\/code><\/pre>\n
        \"Screenshot<\/div>\n
        \u4f7f\u7528\u4fe1\u53f7\u4f5c\u4e3a\u7ec4\u4ef6\u548c\u6a21\u677f<\/h1>\n
        \u8ba9\u6211\u4eec\u5728app.component.ts\u4e2d\u5c1d\u8bd5\u5bfc\u5165\u4fe1\u53f7\u3002<\/p>\n
        import<\/span> {<\/span> Component<\/span>,<\/span> signal<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\n<\/code><\/pre>\n
        \u5728\u8fd9\u91cc\u6709\u8865\u5145\u8bf4\u660e\uff0c\u4f46\u6807\u6ce8\u4e3a@developerPreview\u3002<\/p>\n
        \"Screenshot<\/div>\n
        \u5982\u679c\u6211\u4eec\u5c06\u521d\u59cb\u503c\u5206\u914d\u5230\u4ee5\u4e0b\u7684\u53d8\u91cf\u4e2d\uff0c\u5b83\u4f1a\u5e2e\u6211\u4eec\u63a8\u65ad\u51fa\u53d8\u91cf\u7684\u7c7b\u578b\u3002<\/p>\n
        import<\/span> {<\/span> Component<\/span>,<\/span> signal<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n...<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AppComponent<\/span> {<\/span>\r\n  clickCount<\/span> =<\/span> signal<\/span>(<\/span>0<\/span>);<\/span>\r\n\r\n  addClick<\/span>()<\/span> {<\/span>\r\n    this<\/span>.<\/span>clickCount<\/span>.<\/span>update<\/span>((<\/span>clicks<\/span>)<\/span> =><\/span> clicks<\/span> +<\/span> 1<\/span>);<\/span>\r\n    \/\/ OR<\/span>\r\n    this<\/span>.<\/span>clickCount<\/span>.<\/span>set<\/span>(<\/span>this<\/span>.<\/span>clickCount<\/span>()<\/span> +<\/span> 1<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u5728\u6a21\u677f\u4e2d\u53ef\u4ee5\u6309\u4ee5\u4e0b\u65b9\u5f0f\u663e\u793a\u5f53\u524d\u503c\u3002\u6a21\u677f\u4f1a\u5c06clickCount\u4f5c\u4e3a\u4e00\u4e2a\u51fd\u6570\u8c03\u7528\uff0c\u5e76\u83b7\u53d6\u5f53\u524d\u7684\u503c\u3002<\/p>\n
        <h1><\/span>Count: <\/h1><\/span>\r\n<p><\/span>{{ this.clickCount() }}<\/p><\/span>\r\n\r\n<button<\/span> (click)=<\/span>\"this.addClick()\"<\/span> type=<\/span>\"button\"<\/span>><\/span>Add 2<\/button><\/span>\r\n<\/code><\/pre>\n
        \u4e5f\u8bb8\u6709\u4e00\u4e9b\u6709\u7ecf\u9a8c\u7684\u4eba\u77e5\u9053\u5728\u6a21\u677f\u4e2d\u8c03\u7528\u51fd\u6570\u662f\u5f88\u5371\u9669\u7684\uff0c\u4f46Signal\u4e0d\u4f1a\u5f15\u8d77\u526f\u4f5c\u7528\uff0c\u6240\u4ee5\u4e0d\u5fc5\u62c5\u5fc3\u3002<\/p>\n
        \u5c06\u4f1a\u5f97\u5230\u5982\u4e0b\u7ed3\u679c\u3002<\/p>\n
        \"ezgif.com-video-to-gif.gif\"<\/div>\n
        \u975e\u5e38\u7b80\u5355\u3002<\/p>\n
        \u4f7f\u7528computed\u7684\u65b9\u6cd5<\/h1>\n
        (Simplified Chinese: \u4f7f\u7528computed\u7684\u65b9\u6cd5)<\/p>\n
        Signal\u53ea\u6709\u4e24\u4e2a\u4f5c\u7528\uff0c\u5c31\u662f\u6839\u636e\u4e0a\u8ff0\u8bf4\u660e\uff0c\u5b83\u5177\u6709\u4e00\u4e2a\u503c\u5e76\u4e14\u5728\u8be5\u503c\u53d8\u5316\u65f6\u901a\u77e5\u8fd9\u79cd\u53d8\u5316\u3002<\/p>\n
        \u7136\u800c\uff0c\u5927\u591a\u6570\u540c\u6b65\u5904\u7406\u90fd\u662f\u57fa\u4e8e\u503c\u548c\u503c\u4e4b\u95f4\u7684\u8ba1\u7b97\u3002<\/p>\n
        \u5728\u4f7f\u7528\u4fe1\u53f7\u8fdb\u884c\u8ba1\u7b97\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528computed\u51fd\u6570\uff01<\/p>\n
        \u6211\u5c06\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\u4ecb\u7ecd\u9875\u9762\u6309\u94ae\u3002<\/p>\n
        \r\nimport<\/span> {<\/span> Component<\/span>,<\/span> signal<\/span>,<\/span> computed<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n...<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AppComponent<\/span> {<\/span>\r\n  private<\/span> itemCount<\/span> =<\/span> signal<\/span>(<\/span>124<\/span>);<\/span>\r\n  private<\/span> itemsPerPage<\/span> =<\/span> signal<\/span>(<\/span>10<\/span>);<\/span>\r\n  currentPage<\/span> =<\/span> signal<\/span>(<\/span>0<\/span>);<\/span>\r\n  pageCount<\/span> =<\/span> computed<\/span>(()<\/span> =><\/span> Math<\/span>.<\/span>ceil<\/span>(<\/span>this<\/span>.<\/span>itemCount<\/span>()<\/span> \/<\/span> this<\/span>.<\/span>itemsPerPage<\/span>()));<\/span>\r\n  canGoForward<\/span> =<\/span> computed<\/span>(()<\/span> =><\/span> this<\/span>.<\/span>currentPage<\/span>()<\/span> <<\/span> this<\/span>.<\/span>pageCount<\/span>());<\/span>\r\n  canGoBack<\/span> =<\/span> computed<\/span>(()<\/span> =><\/span> this<\/span>.<\/span>currentPage<\/span>()<\/span> !==<\/span> 0<\/span>);<\/span>\r\n\r\n  goForward<\/span>()<\/span> {<\/span>\r\n    if <\/span>(<\/span>!<\/span>this<\/span>.<\/span>canGoForward<\/span>())<\/span> return<\/span>;<\/span>\r\n    this<\/span>.<\/span>currentPage<\/span>.<\/span>update<\/span>((<\/span>pageNo<\/span>)<\/span> =><\/span> pageNo<\/span> +<\/span> 1<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  goBack<\/span>()<\/span> {<\/span>\r\n    if <\/span>(<\/span>!<\/span>this<\/span>.<\/span>canGoBack<\/span>())<\/span> return<\/span>;<\/span>\r\n    this<\/span>.<\/span>currentPage<\/span>.<\/span>update<\/span>((<\/span>pageNo<\/span>)<\/span> =><\/span> pageNo<\/span> -<\/span> 1<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u5728\u6a21\u677f\u4e2d\uff0c\u6211\u4eec\u5c06\u4e0a\u8ff0\u903b\u8f91\u5e94\u7528\u5230\u6309\u94ae\u5c5e\u6027\u4e0a\uff0c\u5177\u4f53\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
        <h1><\/span>Current Page<\/h1><\/span>\r\n<p><\/span>{{ this.currentPage() }}<\/p><\/span>\r\n<nav><\/span>\r\n  <button<\/span> (click)=<\/span>\"this.goBack()\"<\/span> type=<\/span>\"button\"<\/span> [disabled]=<\/span>\"!this.canGoBack()\"<\/span>><\/span>Back<\/button><\/span>\r\n  <button<\/span> (click)=<\/span>\"this.goForward()\"<\/span> type=<\/span>\"button\"<\/span> [disabled]=<\/span>\"!this.canGoForward()\"<\/span>><\/span>Next<\/button><\/span>\r\n<\/nav><\/span>\r\n<\/code><\/pre>\n
        \u7ed3\u679c (ji\u00e9 gu\u01d2)<\/h2>\n
        \"ezgif.com-video-to-gif<\/div>\n
        \u975e\u5e38\u7b80\u5355\u800c\u4ee4\u4eba\u8d5e\u53f9\uff01 \u00e9r !)<\/p>\n
        \u603b\u7ed3<\/h1>\n
        Angular\u7684\u4fe1\u53f7\u9010\u6e10\u5177\u4f53\u5316\uff0c\u4ee4\u4eba\u5174\u594b\u4e0d\u5df2\u3002<\/p>\n
        \u65e2\u7136\u50cf\u4e0a\u9762\u63d0\u5230\u7684\u540c\u6b65\u5904\u7406\u5728\u6bcf\u4e2a\u903b\u8f91\u4e2d\u90fd\u53d8\u5f97\u975e\u5e38\u7b80\u5355\uff0c\u90a3\u771f\u662f\u5e2e\u4e86\u6211\u5927\u5fd9\u3002<\/p>\n
        \u540c\u65f6\uff0c\u7531\u4e8eVue\u5177\u6709\u7c7b\u4f3c\u7684\u8bed\u6cd5\u7ed3\u6784\uff0c\u6240\u4ee5\u4f5c\u8005\u89c9\u5f97\u5f88\u5bb9\u6613\u63a5\u53d7\u3002<\/p>\n
        \u5927\u5bb6\u4e5f\u8bf7\u52a1\u5fc5\u8bd5\u4e00\u8bd5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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