{"id":39378,"date":"2022-12-30T06:35:06","date_gmt":"2024-02-17T10:54:49","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e6%9f%a5%e7%9c%8b%e7%94%9f%e5%91%bd%e5%91%a8%e6%9c%9f%e6%96%b9%e6%b3%95%ef%bc%88ngafterviewinit-%e5%92%8c-ngafterviewchecked%ef%bc%89\/"},"modified":"2024-04-29T07:38:54","modified_gmt":"2024-04-28T23:38:54","slug":"angular-%e6%9f%a5%e7%9c%8b%e7%94%9f%e5%91%bd%e5%91%a8%e6%9c%9f%e6%96%b9%e6%b3%95%ef%bc%88ngafterviewinit-%e5%92%8c-ngafterviewchecked%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/angular-%e6%9f%a5%e7%9c%8b%e7%94%9f%e5%91%bd%e5%91%a8%e6%9c%9f%e6%96%b9%e6%b3%95%ef%bc%88ngafterviewinit-%e5%92%8c-ngafterviewchecked%ef%bc%89\/","title":{"rendered":"[Angular] \u67e5\u770b\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff08ngAfterViewInit \u548c ngAfterViewChecked\uff09"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bbaAngular\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\uff0c\u91cd\u70b9\u5173\u6ce8ngAfterViewInit\u548cngAfterViewChecked\u3002<\/p>\n<h1>\u66f4\u65b0\u6d88\u606f<\/h1>\n<h2>2021\u5e741\u67083\u65e5<\/h2>\n<ul class=\"post-ul\">\u8a18\u4e8b\u5185\u3067\u6271\u3063\u305f\u30b3\u30fc\u30c9\u3092 Angular v11.0.5 \u3067\u78ba\u8a8d\u3057\u307e\u3057\u305f<\/ul>\n<h1>\u5de5\u4f5c\u73af\u5883<\/h1>\n<div>\n<div class=\"post-table\">\u74b0\u5883\u30d0\u30fc\u30b8\u30e7\u30f3\u5099\u8003<a href=\"https:\/\/cli.angular.io\/\" target=\"_blank\" rel=\"nofollow noopener\">Angular CLI<\/a><del>v1.6.3<\/del> v11.0.5<code>$ ng --version<\/code><a href=\"https:\/\/angular.io\/\" target=\"_blank\" rel=\"nofollow noopener\">Angular<\/a><del>v4.4.6<\/del> v11.0.5\u540c\u4e0a<a href=\"https:\/\/www.typescriptlang.org\/\" target=\"_blank\" rel=\"nofollow noopener\">TypeScript<\/a>v4.0.2\u540c\u4e0a<a href=\"https:\/\/nodejs.org\/ja\/\" target=\"_blank\" rel=\"nofollow noopener\">Node.js<\/a><del>v9.2.1<\/del> v12.18.3<code>$ node --version<\/code><a href=\"https:\/\/www.npmjs.com\/\" target=\"_blank\" rel=\"nofollow noopener\">npm<\/a><del>v5.6.0<\/del> v6.14.6<code>$ npm --version<\/code><\/div>\n<\/div>\n<details>ng \u7248\u672c\u7684\u7ed3\u679c$ ng \u7248\u672c<\/p>\n<p>_ _ ____ _ ___<br \/>\n\/ \\ _ __ __ _ _ _| | __ _ _ __ \/ ___| | |_ _|<br \/>\n\/ \u25b3 \\ | &#8216;_ \\ \/ _` | | | | |\/ _` | &#8216;__| | | | | | |<br \/>\n\/ ___ \\| | | | (_| | |_| | | (_| | | | |___| |___ | |<br \/>\n\/_\/ \\_\\_| |_|\\__, |\\__,_|_|\\__,_|_| \\____|_____|___|<br \/>\n|___\/<\/p>\n<p>Angular CLI\uff1a11.0.5<br \/>\nNode\uff1a12.18.3<br \/>\n\u64cd\u4f5c\u7cfb\u7edf\uff1adarwin x64<\/p>\n<p>Angular\uff1a11.0.5<br \/>\n&#8230;\u52a8\u753b\uff0ccli\uff0c\u516c\u5171\uff0c\u7f16\u8bd1\u5668\uff0c\u7f16\u8bd1\u5668-cli\uff0c\u6838\u5fc3\uff0c\u8868\u5355<br \/>\n&#8230;\u5e73\u53f0\u6d4f\u89c8\u5668\uff0c\u5e73\u53f0\u6d4f\u89c8\u5668\u52a8\u6001\uff0c\u8def\u7531\u5668<br \/>\nIvy \u5de5\u4f5c\u533a\uff1a\u662f\u7684<\/p>\n<p>\u5305 \u7248\u672c<br \/>\n&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<br \/>\n@angular-devkit\/architect 0.1100.5<br \/>\n@angular-devkit\/build-angular 0.1100.5<br \/>\n@angular-devkit\/core 11.0.5<br \/>\n@angular-devkit\/schematics 11.0.5<br \/>\n@schematics\/angular 11.0.5<br \/>\n@schematics\/update 0.1100.5<br \/>\nrxjs 6.6.0<br \/>\ntypescript 4.0.2<\/p>\n<\/details>\n<h1>\u76f8\u5173\u6587\u7ae0<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">[Angular] \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u3092\u307f\u308b(ngOnChanges \u3068 ngOnInit \u3068 ngOnDestroy)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">[Angular] \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u3092\u307f\u308b(ngDoCheck)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">[Angular] \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30e1\u30bd\u30c3\u30c9\u3092\u307f\u308b(ngAfterContentInit \u3068 ngAfterContentChecked)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">[Angular] \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3084\u5916\u90e8\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u53c2\u7167\u3092\u53d6\u5f97\u3059\u308b<\/ul>\n<h1>ngAfterViewInit \u548c ngAfterViewChecked<\/h1>\n<p>\u8fd9\u4e9b\u65b9\u6cd5\u5f88\u5bb9\u6613\u6839\u636e\u65b9\u6cd5\u540d\u63a8\u65ad\u51fa\u6765\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5b83\u4eec\u5728\u89c6\u56fe\u7684\u521d\u59cb\u5316\u548c\u53d8\u5316\u65f6\u6267\u884c\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">ngAfterViewInit \u306f \u30d3\u30e5\u30fc\u306e\u521d\u671f\u5316\u5f8c\u306b\u4e00\u5ea6\u3060\u3051<\/ul>\n<\/li>\n<\/ul>\n<p>ngAfterViewChecked \u306f \u30d3\u30e5\u30fc\u304c\u5909\u66f4\u3055\u308c\u308b\u5ea6 \u306b<\/p>\n<p>\u4e0b\u9762\u7684\u4ee3\u7801\u4e2d\u5206\u522b\u8fd0\u884c\u9a8c\u8bc1\u3002<br \/>\n\u63a5\u4e0b\u6765\uff0c\u901a\u8fc7\u5b9e\u9645\u4ee3\u7801\u8fdb\u884c\u786e\u8ba4\u3002<\/p>\n<h2>\u6839\u7ec4\u4ef6<\/h2>\n<p>\u53ea\u9700\u5728\u8fd9\u91cc\u7b80\u5355\u5730\u6ce8\u518c\u672c\u6b21\u786e\u8ba4\u5bf9\u8c61\u7684\u7ec4\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">&lt;!-- \u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u767b\u9332 --&gt;<\/span>\r\n<span class=\"nt\">&lt;app-view-parent&gt;<\/span>\r\n<span class=\"nt\">&lt;\/app-view-parent&gt;<\/span>\r\n<\/code><\/pre>\n<h2>\u7236\u6bcd\u7ec4\u4ef6<\/h2>\n<p>\u5728\u79f0\u4e3aview-parent.component\u7684\u7236\u7ec4\u4ef6\u4e2d<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u306e\u8a2d\u7f6e<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3067\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u767b\u9332<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u3067\u306f\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3078\u306e\u53c2\u7167\u3092\u53d6\u5f97\u3057\u3066 ngAfterViewChecked \u3067\u66f4\u65b0<\/ul>\n<p>\u8fdb\u884c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nt\">&lt;p&gt;<\/span>\r\n  \u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u30d3\u30e5\u30fc\u306e\u5909\u66f4\u3092\u78ba\u8a8d\u3059\u308b\r\n<span class=\"nt\">&lt;\/p&gt;<\/span>\r\n\r\n<span class=\"nt\">&lt;label<\/span> <span class=\"na\">for=<\/span><span class=\"s\">\"inputText\"<\/span><span class=\"nt\">&gt;<\/span>\u5165\u529b\u9805\u76ee(\u89aa):<span class=\"nt\">&lt;\/label&gt;<\/span>\r\n<span class=\"nt\">&lt;input<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"inputText\"<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"inputText\"<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">[(ngModel)]=<\/span><span class=\"s\">\"ngAfterViewCheckValue\"<\/span> <span class=\"nt\">\/&gt;<\/span>\r\n\r\n<span class=\"c\">&lt;!-- \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u767b\u9332 --&gt;<\/span>\r\n<span class=\"nt\">&lt;app-view-child&gt;<\/span>\r\n<span class=\"nt\">&lt;\/app-view-child&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Component<\/span><span class=\"p\">,<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ ngAferViewInit \u3068 ngAfterViewChecked \u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306e import<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">AfterViewInit<\/span><span class=\"p\">,<\/span> <span class=\"nx\">AfterViewChecked<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e import<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">ViewChild<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092 import<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">ViewChildComponent<\/span><span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">..\/view-child\/view-child.component<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"p\">@<\/span><span class=\"nd\">Component<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">selector<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">app-view-parent<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">templateUrl<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/view-parent.component.html<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">styleUrls<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/view-parent.component.css<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">ViewParentComponent<\/span> <span class=\"k\">implements<\/span> <span class=\"nx\">OnInit<\/span><span class=\"p\">,<\/span> <span class=\"nx\">AfterViewInit<\/span><span class=\"p\">,<\/span> <span class=\"nx\">AfterViewChecked<\/span> <span class=\"p\">{<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * ngAfterViewInit \u3068 ngAfterViewChecked \u306e\u78ba\u8a8d\u306e\u305f\u3081\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\r\n   *\r\n   * @type {String}\r\n   * @memberof ViewChildComponent\r\n   *\/<\/span>\r\n  <span class=\"k\">public<\/span> <span class=\"nx\">ngAfterViewCheckValue<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">''<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u53c2\u7167\r\n   *\r\n   * @type {ViewChildComponent}\r\n   * @memberof ViewParentComponent\r\n   *\/<\/span>\r\n  <span class=\"p\">@<\/span><span class=\"nd\">ViewChild<\/span><span class=\"p\">(<\/span><span class=\"nx\">ViewChildComponent<\/span><span class=\"p\">)<\/span> <span class=\"nx\">viewChild<\/span><span class=\"o\">!<\/span><span class=\"p\">:<\/span> <span class=\"nx\">ViewChildComponent<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"kd\">constructor<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span> <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u521d\u671f\u5316\u51e6\u7406\r\n   *\r\n   * @memberof ViewParentComponent\r\n   *\/<\/span>\r\n  <span class=\"nx\">ngOnInit<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">ngAfterViewCheckValue<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">ngOnInit\u3067\u521d\u671f\u5316\u3057\u305f<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * \u30d3\u30e5\u30fc\u306e\u521d\u671f\u5316\u3092\u30d5\u30c3\u30af\u3059\u308b\r\n   *\r\n   * @memberof ViewParentComponent\r\n   *\/<\/span>\r\n  <span class=\"nx\">ngAfterViewInit<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">[ViewParentComponent][ngAfterViewInit] fired<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * \u30d3\u30e5\u30fc\u306e\u5909\u66f4\u3092\u30d5\u30c3\u30af\u3059\u308b\r\n   *\r\n   * @memberof ViewParentComponent\r\n   *\/<\/span>\r\n  <span class=\"nx\">ngAfterViewChecked<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">[ViewParentComponent][ngAfterViewChecked] fired. ngAfterViewCheckValue={<\/span><span class=\"dl\">'<\/span> <span class=\"o\">+<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">ngAfterViewCheckValue<\/span> <span class=\"o\">+<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">}<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u5b50\u7ec4\u4ef6<\/h2>\n<p>\u5728\u5b50\u7ec4\u4ef6view-child.component\u4e2d\u5c55\u793a\u4e86<\/p>\n<ul class=\"post-ul\">\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u306e\u8a2d\u7f6e<\/ul>\n<p>\u8fdb\u884c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nt\">&lt;p&gt;<\/span>\r\n  \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u30d3\u30e5\u30fc\u306e\u5909\u66f4\u3092\u78ba\u8a8d\u3059\u308b\r\n<span class=\"nt\">&lt;\/p&gt;<\/span>\r\n\r\n<span class=\"nt\">&lt;label<\/span> <span class=\"na\">for=<\/span><span class=\"s\">\"inputText\"<\/span><span class=\"nt\">&gt;<\/span>\u5165\u529b\u9805\u76ee(\u5b50):<span class=\"nt\">&lt;\/label&gt;<\/span>\r\n<span class=\"nt\">&lt;input<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"inputText\"<\/span> <span class=\"na\">name=<\/span><span class=\"s\">\"inputText\"<\/span> <span class=\"na\">type=<\/span><span class=\"s\">\"text\"<\/span> <span class=\"na\">[(ngModel)]=<\/span><span class=\"s\">\"ngAfterViewCheckValue\"<\/span> <span class=\"nt\">\/&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Component<\/span><span class=\"p\">,<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ ngAferViewInit \u3068 ngAfterViewChecked \u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306e import<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">AfterViewInit<\/span><span class=\"p\">,<\/span> <span class=\"nx\">AfterViewChecked<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"p\">@<\/span><span class=\"nd\">Component<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">selector<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">app-view-child<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">templateUrl<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/view-child.component.html<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">styleUrls<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/view-child.component.css<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">ViewChildComponent<\/span> <span class=\"k\">implements<\/span> <span class=\"nx\">OnInit<\/span><span class=\"p\">,<\/span> <span class=\"nx\">AfterViewInit<\/span><span class=\"p\">,<\/span> <span class=\"nx\">AfterViewChecked<\/span> <span class=\"p\">{<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * ngAfterViewInit \u3068 ngAfterViewChecked \u306e\u78ba\u8a8d\u306e\u305f\u3081\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\r\n   *\r\n   * @type {String}\r\n   * @memberof ViewChildComponent\r\n   *\/<\/span>\r\n  <span class=\"k\">public<\/span> <span class=\"nx\">ngAfterViewCheckValue<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">''<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"kd\">constructor<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span> <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u521d\u671f\u5316\u51e6\u7406\r\n   *\r\n   * @memberof ViewChildComponent\r\n   *\/<\/span>\r\n  <span class=\"nx\">ngOnInit<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">ngAfterViewCheckValue<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">ngOnInit\u3067\u521d\u671f\u5316\u3057\u305f<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * \u30d3\u30e5\u30fc\u306e\u521d\u671f\u5316\u3092\u30d5\u30c3\u30af\u3059\u308b\r\n   *\r\n   * @memberof ViewChildComponent\r\n   *\/<\/span>\r\n  <span class=\"nx\">ngAfterViewInit<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">[ViewChildComponent][ngAfterViewInit] fired.<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"cm\">\/**\r\n   * \u30d3\u30e5\u30fc\u306e\u5909\u66f4\u3092\u30d5\u30c3\u30af\u3059\u308b\r\n   *\r\n   * @memberof ViewChildComponent\r\n   *\/<\/span>\r\n  <span class=\"nx\">ngAfterViewChecked<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">[ViewChildComponent][ngAfterViewChecked] fired. ngAfterViewCheckValue={<\/span><span class=\"dl\">'<\/span> <span class=\"o\">+<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">ngAfterViewCheckValue<\/span> <span class=\"o\">+<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">}<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u8fd9\u6bb5\u793a\u4f8b\u4ee3\u7801\u7684\u76ee\u7684\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>\u5728\u7236\u7ec4\u4ef6\u548c\u5b50\u7ec4\u4ef6\u4e2d\u90fd\u8bbe\u7f6e\u4e86\u8f93\u5165\u8868\u5355\u3002\u5176\u76ee\u7684\u662f<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u30d3\u30e5\u30fc\u3092\u5909\u66f4\u3057\u305f\u969b\u306b\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u691c\u77e5\u3059\u308b\u306e\u304b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u9006\u306b\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u30d3\u30e5\u30fc\u3092\u5909\u66f4\u3057\u305f\u969b\u306b\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u691c\u77e5\u3059\u308b\u306e\u304b<\/ul>\n<p>\u4e3a\u4e86\u786e\u8ba4<\/p>\n<h2>\u6211\u8981\u786e\u8ba4\u6267\u884c\u7ed3\u679c\u3002<\/h2>\n<p>\u6253\u5f00\u5e94\u7528\u5e76\u4ece\u65e5\u5fd7\u4e2d\u786e\u8ba4\u6267\u884c\u7ed3\u679c\u3002<\/p>\n<h3>\u4e00\u5f00\u59cb\u542f\u52a8<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d3a3b37434c4406c7d15c\/38-0.png\" alt=\"ngAfterView-boot.png\" \/><\/div>\n<p>\u5728\u542f\u52a8\u540e\u7684\u65e5\u5fd7\u4e2d\uff0c\u53ef\u4ee5\u786e\u8ba4\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067 ngAfterViewInit -&gt; ngAfterViewChecked \u306e\u9806\u3067\u5b9f\u884c\u3055\u308c (\u30aa\u30ec\u30f3\u30b8\u8272\u306e\u67a0)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u6b21\u306b\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067 ngAfterViewInit -&gt; ngAfterViewChecked \u306e\u9806\u3067\u5b9f\u884c\u3055\u308c\u305f (\u9752\u8272\u306e\u67a0)<\/ul>\n<p>\u6bcf\u4e2a\u65b9\u6cd5\u7684\u6267\u884c\u987a\u5e8f<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e ngAfterViewInit -&gt; \u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e ngAfterViewInit \u306e\u9806\u3001<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3042\u308b\u3044\u306f\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e ngAfterViewChecked -&gt; \u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e ngAfterViewChecked \u306e\u9806<\/ul>\n<p>\u800c\u4e0d\u662f\u5173\u6ce8\u4e8e\u8be5\u7ec4\u4ef6\u5185\u8fde\u7eed\u6267\u884c\u7684\u70b9\u3002<br \/>\n\u8fd9\u662f\u56e0\u4e3a\u5b83\u5728\u521d\u59cb\u5316\u89c6\u56fe\u3001\u68c0\u6d4b\u5e76\u6267\u884c\u4e86\u53d8\u66f4\u540e\uff0c\u624d\u4f1a\u8f6c\u79fb\u5230\u4e0b\u4e00\u4e2a\u7ec4\u4ef6\u7684\u5904\u7406\u4e0a\u3002<\/p>\n<ul class=\"post-ul\">\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5358\u4f4d\u3067 Init \u3068 Checked \u304c\u884c\u308f\u308c\u308b<\/ul>\n<p>\u6211\u660e\u767d\u4e86\u3002<\/p>\n<h3>\u901a\u8fc7\u4eb2\u5b50\u7ec4\u4ef6\u7684\u8f93\u5165\u8fdb\u884c\u66f4\u65b0<\/h3>\n<p>\u5728\u7236\u7ec4\u4ef6\u7684\u8f93\u5165\u8868\u5355\u4e2d\u8f93\u5165&#8221;\u901a\u8fc7\u7236\u7ec4\u4ef6\u7684\u8f93\u5165\u8fdb\u884c\u66f4\u65b0&#8221;\u65f6\uff0c\u4e0b\u56fe\u663e\u793a\u7684\u65e5\u5fd7\u5982\u4e0b\uff08\u7d2b\u8272\u6846\u5185\uff09\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d3a3b37434c4406c7d15c\/48-0.png\" alt=\"ngAfterView-input-parent.png\" \/><\/div>\n<p>\u7136\u540e\uff0c\u5728\u5b50\u7ec4\u4ef6\u7684\u8f93\u5165\u8868\u5355\u4e2d\u8f93\u5165&#8221;\u901a\u8fc7\u7236\u7ec4\u4ef6\u7684\u8f93\u5165\u8fdb\u884c\u66f4\u65b0&#8221;\u65f6\uff0c\u65e5\u5fd7\u5982\u4e0b\u56fe\u6240\u793a\uff08\u5728\u7eff\u8272\u6846\u5185\uff09\u3002\u6b64\u65f6\u9700\u8981\u5148\u6309\u4e0bF5\u952e\u91cd\u65b0\u52a0\u8f7d\u9875\u9762\uff0c\u7136\u540e\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d3a3b37434c4406c7d15c\/50-0.png\" alt=\"ngAfterView-input-child.png\" \/><\/div>\n<p>\u4ece\u4e24\u4e2a\u65e5\u5fd7\u4e2d\u53ef\u4ee5\u770b\u51fa<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e ngAfterViewChecked \u304c\u5b9f\u884c\u3055\u308c<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u6b21\u306b\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8 ngAfterViewChecked \u304c\u5b9f\u884c\u3055\u308c\u305f<\/ul>\n<p>\u53ef\u4ee5\u786e\u8ba4\u8fd9\u4e00\u70b9\u3002\u540c\u65f6\u65e0\u8bba\u5728\u7236\u7ec4\u4ef6\u8fd8\u662f\u5b50\u7ec4\u4ef6\u4e2d\u8f93\u5165\u90fd\u53ef\u4ee5\u3002<\/p>\n<ul class=\"post-ul\">\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e ngAfterViewChecked \u3068 \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e ngAfterViewChecked \u304c\u5b9f\u884c\u3055\u308c\u305f<\/ul>\n<p>\u53ef\u4ee5\u786e\u8ba4\u8fd9\u4e00\u70b9\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8e ngAfterViewInit \u53ea\u5728\u5e94\u7528\u7a0b\u5e8f\u542f\u52a8\u540e\u6267\u884c\u4e00\u6b21\uff0c\u56e0\u6b64\u5728\u8fdb\u884c\u6b64\u64cd\u4f5c\u65f6\u53ea\u6267\u884c\u4e86 ngAfterViewChecked\u3002<\/p>\n<p>\u6ce8\u610f\u529b\u96c6\u4e2d\u5728<\/p>\n<p>(zh\u00f9 m\u00f9 ju\u00e9<\/p>\n<ul class=\"post-ul\">\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u4e21\u65b9\u306e ngAfterViewChecked \u304c\u5b9f\u884c<\/ul>\n<p>\u5982\u679c\u4ece\u8fd9\u4e00\u70b9\u51fa\u53d1\uff0c\u5bf9\u89c6\u56fe\u8fdb\u884c\u4e86\u66f4\u6539\u7684\u8bdd\uff0c<\/p>\n<p>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5358\u4f4d\u306e\u5909\u66f4\u3067\u306f\u306a\u304f\u305d\u306e\u30da\u30fc\u30b8\u5168\u4f53\u306e\u5909\u66f4\u3068\u3057\u3066\u691c\u77e5\u3055\u308c\u3066\u3044\u308b\u3053\u3068<br \/>\n\u307e\u305f ngAfterViewChecked \u3092\u5b9f\u88c5\u3057\u305f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5168\u3066\u3067\u5909\u66f4\u3092\u30d5\u30c3\u30af\u3057\u3066\u3044\u308b<\/p>\n<p>\u80fd\u591f\u7406\u89e3\u8fd9\u4ef6\u4e8b\u3002<\/p>\n<h1>\u603b\u7ed3\u4e00\u4e0b<\/h1>\n<p>\u867d\u7136\u91cd\u590d\u4e86\u5728\u6267\u884c\u7ed3\u679c\u786e\u8ba4\u4e2d\u6240\u5199\u7684\u5185\u5bb9\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u786e\u8ba4\u4ee5\u4e0b\u4e8b\u9879\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">ngAfterViewInit \u3068 ngAfterViewChecked \u306f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5358\u4f4d\u3067 Init \u3068 Checked \u304c\u884c\u308f\u308c\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d3\u30e5\u30fc\u306e\u5909\u66f4\u304c\u884c\u308f\u308c\u305f\u3089\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5358\u4f4d\u306e\u5909\u66f4\u3067\u306f\u306a\u304f\u305d\u306e\u30da\u30fc\u30b8\u5168\u4f53\u306e\u5909\u66f4\u3068\u3057\u3066\u691c\u77e5\u3055\u308c\u3066\u3044\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>ngAfterViewChecked \u3092\u5b9f\u88c5\u3057\u305f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u5168\u3066\u3067\u5909\u66f4\u3092\u30d5\u30c3\u30af\u3057\u3066\u3044\u308b\u3053\u3068<\/p>\n<p>\u5bf9\u4e8e\u5728\u4e0a\u8ff0\u76f8\u5173\u6587\u7ae0\u4e2d\u770b\u5230\u7684\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff0c\u540c\u6837\u53ef\u4ee5\u8bf4\uff0c\u5f53\u7ec4\u4ef6\u6216\u89c6\u56fe\u53d1\u751f\u521d\u59cb\u5316\u6216\u66f4\u6539\u65f6\uff0c\u751f\u547d\u5468\u671f\u65b9\u6cd5\u4f1a\u94a9\u53d6\u5e76\u6267\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cAngular 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