{"id":39539,"date":"2023-04-17T20:05:10","date_gmt":"2023-04-29T06:48:37","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%ba%86%e8%a7%a3angular%e7%9a%84input%e5%92%8coutput%e3%80%82\/"},"modified":"2024-04-29T23:59:39","modified_gmt":"2024-04-29T15:59:39","slug":"%e4%ba%86%e8%a7%a3angular%e7%9a%84input%e5%92%8coutput%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%ba%86%e8%a7%a3angular%e7%9a%84input%e5%92%8coutput%e3%80%82\/","title":{"rendered":"\u4e86\u89e3Angular\u7684@Input()\u548c@Output()"},"content":{"rendered":"

\u9996\u5148\/\u8d77\u521d\/\u6700\u521d<\/h1>\n

\u6709\u65f6\u5019\u5728\u4e1a\u52a1\u4e2d\u9047\u5230\u9700\u8981\u5b9e\u65bd\u9632\u6b62\u591a\u6b21\u70b9\u51fb\u6309\u94ae\u7684\u89e3\u51b3\u65b9\u6848\u7684\u60c5\u51b5\u3002\u56e0\u6b64\u6211\u60f3\u7740\u5236\u4f5c\u4e00\u4e2a\u50cf\u9b54\u6cd5\u4e00\u6837\u7684\u6309\u94ae\u7ec4\u4ef6\uff0c\u901a\u8fc7\u4f7f\u7528\u8fd9\u4e2a\u7ec4\u4ef6\u6765\u5b9e\u73b0\u6309\u94ae\uff0c\u5b83\u53ef\u4ee5\u81ea\u52a8\u5728\u5185\u90e8\u6267\u884c\u8fd9\u79cd\u9632\u6b62\u591a\u6b21\u70b9\u51fb\u7684\u7b56\u7565\u3002\u4f46\u662f\u6211\u8bd5\u56fe\u5b9e\u73b0\u7684\u65b9\u6cd5\u88ab\u8ba4\u4e3a\u662f\u53cd\u6a21\u5f0f\uff0c\u6240\u4ee5\u653e\u5f03\u4e86\u3002
\n\u867d\u7136\u6709\u4eba\u8bf4\u6211\u53ea\u662f\u6d6a\u8d39\u4e86\u65f6\u95f4\uff0c\u4f46\u4e8b\u5b9e\u5e76\u975e\u5982\u6b64\uff0c\u591a\u4e8f\u4e86\u8fd9\u4e2a\uff0c\u6211\u80fd\u591f\u7406\u89e3Angular\u4e2d\u7684@Input()\u548c@Output()\u6982\u5ff5\u3002\u56e0\u6b64\uff0c\u6211\u5e0c\u671b\u80fd\u5728\u672c\u6587\u4e2d\u5206\u4eab\u6211\u5bf9\u8fd9\u4e9b\u6982\u5ff5\u7684\u7406\u89e3\u548c\u8bb0\u5f55\u3002<\/p>\n

\u8bf7\u7559\u610f\u4ee5\u4e0b\u4e8b\u9879<\/h2>\n

\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86Angular-material\u3002
\n\u53e6\u5916\uff0c\u6211\u4eec\u5c06\u7701\u7565\u5728app.module.ts\u4e2d\u58f0\u660e\u6a21\u5757\u7684\u90e8\u5206\u3002<\/p>\n

@Input()\u548c@Output()\u4ee3\u8868\u4e86\u4ec0\u4e48\u610f\u601d\uff1f<\/h2>\n

\u9996\u5148\uff0c\u6211\u5c06\u7b80\u8981\u89e3\u91ca\u8fd9\u4e9b\u7684\u4f5c\u7528\u3002
\n\u9996\u5148\uff0c@Input()\u7684\u4f5c\u7528\u662f\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u503c\u7ed9\u5b50\u7ec4\u4ef6\u3002
\n\u800c@Output()\u7684\u4f5c\u7528\u662f\u4ece\u5b50\u7ec4\u4ef6\u4f20\u9012\u4e8b\u4ef6\uff08\u503c\uff09\u7ed9\u7236\u7ec4\u4ef6\u3002<\/p>\n

\u5c1d\u8bd5\u7528\u4ee3\u7801\u6df1\u5165\u7406\u89e3\u3002<\/h2>\n

\u8fd9\u6b21\u6211\u4eec\u5c06\u4ee5\u4e00\u4e2a\u7b80\u5355\u7684\u6309\u94ae\u7ec4\u4ef6\u793a\u4f8b\u6765\u89e3\u91ca\u3002
\n\u9996\u5148\u6211\u4eec\u770b\u4e00\u4e0b\u7ec4\u4ef6\u4e4b\u95f4\u7684\u7236\u5b50\u5173\u7cfb\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u8c03\u7528\u6309\u94ae\u7ec4\u4ef6\u7684\u90a3\u4e00\u65b9\uff08\u6bd4\u5982app.component\uff09\u5c31\u662f\u7236\u7ec4\u4ef6\uff0c\u800c\u6309\u94ae\u7ec4\u4ef6\u5219\u662f\u5b50\u7ec4\u4ef6\u3002<\/p>\n

\u8bf7\u63d0\u4f9b\u8f93\u5165\u3002<\/h3>\n

\u6309\u94ae\u7ec4\u4ef6<\/p>\n

import<\/span> {<\/span> Component<\/span>,<\/span> Input<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-amazing-button<\/span>'<\/span>,<\/span>\r\n  templateUrl<\/span>:<\/span> '<\/span>.\/amazing-button.component.html<\/span>'<\/span>,<\/span>\r\n  styleUrls<\/span>:<\/span> [<\/span>'<\/span>.\/amazing-button.component.css<\/span>'<\/span>]<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AmazingButtonComponent<\/span> {<\/span>\r\n\r\n    @<\/span>Input<\/span>()<\/span> buttonText<\/span>:<\/span> string<\/span> =<\/span> '<\/span>BUTTON<\/span>'<\/span>;<\/span>\r\n    @<\/span>Input<\/span>()<\/span> buttonColor<\/span>:<\/span> string<\/span> =<\/span> ''<\/span>;<\/span>\r\n\r\n    constructor<\/span>()<\/span> {<\/span> }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
<button<\/span> mat-raised-button<\/span> color=<\/span>\"buttonColor\"<\/span>><\/span>{{buttonText}}<\/button><\/span>\r\n<\/code><\/pre>\n
\u5728\u6309\u94ae\u7ec4\u4ef6\u4e2d\uff0c\u6211\u4eec\u58f0\u660e\u4e86@Input() buttonText\u548c@Input() buttonColor\u3002\u5b83\u4eec\u5206\u522b\u7528\u4e8e\u6307\u5b9a\u6309\u94ae\u7684\u540d\u79f0\u548c\u989c\u8272\u3002<\/p>\n
\u901a\u8fc7\u58f0\u660e@Input()\u4fee\u9970\u7684\u53d8\u91cf\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6b64\u7ec4\u4ef6\u4f5c\u4e3a\u5c5e\u6027\u4ece\u7236\u7ec4\u4ef6\u8c03\u7528\uff0c\u5e76\u5c06\u503c\u5b58\u50a8\u5728\u8be5\u5c5e\u6027\u4e2d\uff0c\u4ee5\u5b9e\u73b0\u4ece\u7236\u7ea7\u5230\u5b50\u7ea7\u7684\u503c\u4f20\u9012\u3002<\/p>\n
\u9996\u5148\u4e0d\u6307\u5b9a\uff0c\u6211\u4eec\u5c1d\u8bd5\u4ece\u7236\u7ec4\u4ef6\u8c03\u7528\u5b50\u7ec4\u4ef6\u3002<\/p>\n
<app-amazing-button><\/app-amazing-button><\/span>\r\n<\/code><\/pre>\n
\"angular-material-button1.JPG\"<\/div>\n
\u8fd9\u6b21\u5c1d\u8bd5\u5c06buttonText\u4f5c\u4e3a\u5c5e\u6027\u8fdb\u884c\u6307\u5b9a…<\/p>\n
<app-amazing-button<\/span> buttonText=<\/span>\"!!AmazingButton!!\"<\/span>><\/app-amazing-button><\/span>\r\n<\/code><\/pre>\n
\"angular-material-button2.JPG\"<\/div>\n
<app-amazing-button<\/span> buttonText=<\/span>\"!!AmazingButton!!\"<\/span> buttonColor=<\/span>\"accent\"<\/span>><\/app-amazing-button><\/span>\r\n<\/code><\/pre>\n
\"angularbutton3.JPG\"<\/div>\n
\u5728\u4ee5\u4e0b\u60c5\u51b5\u4e0b\uff0c@Input()\u7528\u4e8e\u4ece\u7236\u7ec4\u4ef6\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u503c\u3002<\/p>\n
@Output()\u88c5\u9970\u5668<\/h3>\n
\u6211\u4eec\u5c06\u7ee7\u7eed\u4f7f\u7528”\u7ee7\u7eed”\u6309\u94ae\u7ec4\u4ef6\u3002<\/p>\n
\u6309\u94ae\u7ec4\u4ef6<\/p>\n
import<\/span> {<\/span> Component<\/span>,<\/span> EventEmitter<\/span>,<\/span> Input<\/span>,<\/span> Output<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-amazing-button<\/span>'<\/span>,<\/span>\r\n  templateUrl<\/span>:<\/span> '<\/span>.\/amazing-button.component.html<\/span>'<\/span>,<\/span>\r\n  styleUrls<\/span>:<\/span> [<\/span>'<\/span>.\/amazing-button.component.css<\/span>'<\/span>]<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AmazingButtonComponent<\/span> {<\/span>\r\n\r\n    @<\/span>Input<\/span>()<\/span> buttonText<\/span>:<\/span> string<\/span> =<\/span> '<\/span>BUTTON<\/span>'<\/span>;<\/span>\r\n    @<\/span>Input<\/span>()<\/span> buttonColor<\/span>:<\/span> string<\/span> =<\/span> ''<\/span>;<\/span>\r\n\r\n    @<\/span>Output<\/span>()<\/span> addOops<\/span>:<\/span> EventEmitter<\/span><<\/span>string<\/span>><\/span> =<\/span> new<\/span> EventEmitter<\/span>();<\/span> \/\/ \u8ffd\u52a0<\/span>\r\n\r\n    constructor<\/span>()<\/span> {<\/span> }<\/span>\r\n\r\n    \/**\r\n     * \u8ffd\u52a0\r\n     *\/<\/span>\r\n    sendText<\/span>()<\/span> {<\/span>\r\n        this<\/span>.<\/span>addOops<\/span>.<\/span>emit<\/span>(<\/span>'<\/span>Oops!<\/span>'<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
<!--click\u30a4\u30d9\u30f3\u30c8\u3092\u8ffd\u52a0--><\/span>\r\n<button<\/span> mat-raised-button<\/span> color=<\/span>\"{{buttonColor}}\"<\/span> (click)=<\/span>\"sendText()\"<\/span>><\/span>{{buttonText}}<\/button><\/span>\r\n<\/code><\/pre>\n
\u6211\u5df2\u7ecf\u4f7f\u7528@Output()\u548c\u70b9\u51fb\u4e8b\u4ef6sendText()\u5b9e\u73b0\u4e86addOops\u8fd9\u4e2a\u529f\u80fd\u3002
\n\u5728\u58f0\u660e@Output()\u65f6\uff0c\u8981\u5b9e\u4f8b\u5316EventEmitter\u3002
\n\u88ab\u58f0\u660e\u4e3a@Output()\u7684\u53d8\u91cf\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u7531\u7236\u7ec4\u4ef6\u4f7f\u7528\u7684\u4e8b\u4ef6\uff0c\u5e76\u901a\u8fc7\u63a5\u6536\u5728\u8be5\u4e8b\u4ef6\u4e2d\u53d1\u51fa\u7684\u503c\u6765\u5b9e\u73b0\u4ece\u5b50\u7ec4\u4ef6\u5230\u7236\u7ec4\u4ef6\u7684\u503c\u4f20\u9012\u3002<\/p>\n
\u5728\u6211\u4eec\u5f00\u59cb\u89e3\u91ca\u5b9e\u9645\u64cd\u4f5c\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u4e5f\u628a\u5bb6\u957f\u65b9\u9762\u7684\u5b9e\u65bd\u8003\u8651\u8fdb\u53bb\u3002<\/p>\n
<!--\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u8ffd\u52a0--><\/span>\r\n<app-amazing-button<\/span> buttonText=<\/span>\"!!AmazingButton!!\"<\/span> buttonColor=<\/span>\"accent\"<\/span> (addOops)=<\/span>\"logMessage($event)\"<\/span>><\/app-amazing-button><\/span>\r\n<\/code><\/pre>\n
import<\/span> {<\/span> Component<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-root<\/span>'<\/span>,<\/span>\r\n  templateUrl<\/span>:<\/span> '<\/span>.\/app.component.html<\/span>'<\/span>,<\/span>\r\n  styleUrls<\/span>:<\/span> [<\/span>'<\/span>.\/app.component.css<\/span>'<\/span>]<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AppComponent<\/span> {<\/span>\r\n\r\n    \/**\r\n     * \u8ffd\u52a0\r\n     *\/<\/span>\r\n    logMessage<\/span>(<\/span>text<\/span>:<\/span> string<\/span>)<\/span> {<\/span>\r\n        console<\/span>.<\/span>log<\/span>(<\/span>`<\/span>${<\/span>text<\/span>}<\/span>, Hello Angular!`<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u7236\u7ec4\u4ef6\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5b50\u7ec4\u4ef6\u4e2d\u58f0\u660e\u4e3a@Output()\u7684\u53d8\u91cf\u4f5c\u4e3a\u4e8b\u4ef6\u3002
\n\u8fd9\u662f\u5728app.component.html\u4e2d\u7684(addOops)=~\u90e8\u5206\u3002
\n\u5f53\u70b9\u51fb\u6b64\u6309\u94ae\u65f6\uff0c\u9996\u5148\u89e6\u53d1\u5b50\u7ec4\u4ef6\u4e2d\u58f0\u660e\u7684\u4e8b\u4ef6\u3002
\n\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5bf9\u5e94\u7684\u4e8b\u4ef6\u662famazing-button.component\u7684(click)\u4e8b\u4ef6\u3002<\/p>\n
  sendText<\/span>()<\/span> {<\/span>\r\n      this<\/span>.<\/span>addOops<\/span>.<\/span>emit<\/span>(<\/span>'<\/span>Oops!<\/span>'<\/span>);<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u5f53\u8c03\u7528\u540d\u4e3aemit()\u7684\u51fd\u6570\u65f6\uff0c\u5b83\u4f1a\u5c06\u503c\u4f20\u9012\u7ed9\u8c03\u7528\u5176\u7236\u51fd\u6570\u7684\u5730\u65b9\u3002\u60a8\u53ef\u4ee5\u5c06\u8981\u4f20\u9012\u7684\u503c\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u3002<\/p>\n
\u5b50\u7ec4\u4ef6\u5df2\u7ecf\u4f20\u9012\u4e86\u503c\u3002\u5728\u7236\u7ec4\u4ef6\u4e2d\u63a5\u6536\u8fd9\u4e2a\u503c\u7684\u65b9\u5f0f\u662f\u3002<\/p>\n
(<\/span>addOops<\/span>)<\/span>=<\/span>\"<\/span>logMessage($event)\r\n<\/span><\/code><\/pre>\n
\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
  logMessage<\/span>(<\/span>text<\/span>:<\/span> string<\/span>)<\/span> {<\/span>\r\n      console<\/span>.<\/span>log<\/span>(<\/span>`<\/span>${<\/span>text<\/span>}<\/span>, Hello Angular!`<\/span>);<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u5f53\u6211\u4eec\u5728\u7ec4\u4ef6\u4e2d\u4f20\u9012\u4e00\u4e2a\u540d\u4e3atext\u7684\u53c2\u6570\u65f6\uff0c\u5b50\u7ec4\u4ef6\u4f20\u9012\u7684\u503c\u5c06\u88ab\u8d4b\u7ed9text\uff0c\u4ee5\u4fbf\u5728\u7236\u7ec4\u4ef6\u4e2d\u4f7f\u7528\u3002\u5f53\u6211\u4eec\u5c1d\u8bd5\u8fd0\u884c\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u6548\u679c\u3002<\/p>\n
Oops!, Hello Angular!\r\n<\/code><\/pre>\n
\u5e76\u5728\u63a7\u5236\u53f0\u4e0a\u663e\u793a\u3002<\/p>\n
\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5728 @Output() \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 emit() \u5c06\u6570\u636e\u8fd4\u56de\u4e3a\u4e00\u4e2a\u5bf9\u8c61\uff0c\u53ef\u4ee5\u8fd4\u56de\u591a\u4e2a\u6570\u636e\u3002<\/p>\n
\u5c3d\u7ba1\u53d8\u5f97\u5197\u957f\u4e86\uff0c\u4f46\u5f52\u7eb3\u4e00\u4e0b@Output()\u7684\u6d41\u7a0b\u5982\u4e0b\u3002<\/p>\n
    \n
  1. \n
      \u5b50\u7ec4\u4ef6\u7684\u4e8b\u4ef6\u89e6\u53d1\u3002<\/ol>\n<\/li>\n<\/ol>\n
       <\/p>\n
        \n
      1. \n
          \u5728\u5b50\u7ec4\u4ef6\u7684\u5904\u7406\u4e2d\u8fdb\u884cemit()\u3002<\/ol>\n<\/li>\n<\/ol>\n
           <\/p>\n
            \u5728\u7236\u7ec4\u4ef6\u4e2d\u4f7f\u7528$event\u63a5\u6536\u3002<\/ol>\n
            \u9019\u662f\u5982\u6b64\u3002<\/p>\n
            \u5c31\u50cf\u8fd9\u6837\uff0c@Output()\u7528\u4e8e\u5c06\u4e8b\u4ef6(\u503c)\u4ece\u5b50\u7ec4\u4ef6\u4f20\u9012\u7ed9\u7236\u7ec4\u4ef6\u3002<\/p>\n
            \u987a\u4fbf\u63d0\u4e00\u4e0b<\/h2>\n
            \u867d\u7136@Input()\u3001@Output()\u4f1a\u7ecf\u5e38\u88ab\u4f7f\u7528\uff0c\u4f46\u4e5f\u5b58\u5728\u7740\u53cd\u6a21\u5f0f\u3002
            \n\u5173\u4e8e\u53cd\u6a21\u5f0f\u7684\u8be6\u60c5\u8bf7\u89c1\u8fd9\u91cc\u3002<\/p>\n
            Angular2\u7684\u53cd\u6a21\u5f0f\u96c6\u5408
            \n\u5f53\u4f7f\u7528@Input\u7ed1\u5b9a\u5bf9\u8c61\u65f6\uff0c\u4f1a\u9047\u5230\u5404\u79cd\u95ee\u9898\u3010ionic\u3011\u3010Angular\u3011
            \n\u5c06\u5bf9\u8c61\u4f5c\u4e3a@Input\u7ed1\u5b9a<\/p>\n
            \u770b\u8d77\u6765\u5bf9\u8c61\u5c06\u6210\u4e3a\u5f15\u7528\u4f20\u9012\u7684\u65b9\u5f0f\u3002\u53ef\u80fd\u4f1a\u5bfc\u81f4\u610f\u60f3\u4e0d\u5230\u7684\u884c\u4e3a…\u3002<\/p>\n
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