{"id":38986,"date":"2022-11-06T02:19:09","date_gmt":"2023-02-15T12:12:47","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%81%b5%e5%be%aaangular%e5%85%ac%e5%bc%8f%e6%96%87%e6%a1%a3%e5%ad%a6%e4%b9%a0%e7%90%86%e8%a7%a3angular-2\/"},"modified":"2024-04-28T23:16:03","modified_gmt":"2024-04-28T15:16:03","slug":"%e9%81%b5%e5%be%aaangular%e5%85%ac%e5%bc%8f%e6%96%87%e6%a1%a3%e5%ad%a6%e4%b9%a0%e7%90%86%e8%a7%a3angular-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%81%b5%e5%be%aaangular%e5%85%ac%e5%bc%8f%e6%96%87%e6%a1%a3%e5%ad%a6%e4%b9%a0%e7%90%86%e8%a7%a3angular-2\/","title":{"rendered":"\u9075\u5faaAngular\u516c\u5f0f\u6587\u6863\u5b66\u4e60\u7406\u89e3Angular 2"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u6211\u9075\u5faaAngular\u516c\u5f0f\u6587\u6863\u4e86\u89e3\u4e86Angular\u57fa\u672c\u7ed3\u6784\uff0c\u5728Angular\u7406\u89e3\u2460\u4e2d\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u7ee7\u7eed\u6309\u7167\u5b98\u65b9\u6587\u6863\u8fdb\u884c\u7406\u89e3\u3002<\/p>\n<h1>Angular \u6559\u7a0b<\/h1>\n<p>\u672c\u6587\u6309\u7167\u6dfb\u52a0\u5bfc\u822a\u7684\u987a\u5e8f\uff0c\u901a\u8fc7\u4fee\u6539\u548c\u6dfb\u52a0\u793a\u4f8b\u4ee3\u7801\u6765\u8fdb\u884c\u3002\u672c\u6587\u5c06\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b URL \u3092\u5165\u529b\u3057\u3066\u3001\u5bfe\u5fdc\u3059\u308b\u5546\u54c1\u30da\u30fc\u30b8\u306b\u79fb\u52d5<\/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\">\u30da\u30fc\u30b8\u4e0a\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u5358\u4e00\u30da\u30fc\u30b8\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u3092\u79fb\u52d5<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30d6\u30e9\u30a6\u30b6\u306e\u623b\u308b\u30dc\u30bf\u30f3\u3068\u9032\u3080\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u5c65\u6b74\u3092\u76f4\u611f\u7684\u306b\u30ca\u30d3\u30b2\u30fc\u30c8<\/ul>\n<h2>\u5c06URL\u8def\u5f84\u4e0e\u7ec4\u4ef6\u76f8\u5173\u8054<\/h2>\n<h3>1. \u6dfb\u52a0\u8def\u7531<\/h3>\n<p>\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ec4\u4ef6ProductDetailsComponent\uff0c\u7528\u4e8e\u5546\u54c1\u8be6\u7ec6\u4fe1\u606f\u3002\u5728app.module.ts\u4e2d\u6dfb\u52a0\u8def\u5f84\u548c\u7ec4\u4ef6\u3002\u6b64\u5916\uff0c\u867d\u7136\u5b98\u65b9\u6587\u6863\u4e2d\u6ca1\u6709\u63d0\u5230\uff0c\u4f46\u4e5f\u5e94\u5c06ProductDetailsComponent\u6dfb\u52a0\u5230declarations\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">@<\/span><span class=\"nd\">NgModule<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">imports<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"nx\">BrowserModule<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nx\">ReactiveFormsModule<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nx\">RouterModule<\/span><span class=\"p\">.<\/span><span class=\"nx\">forRoot<\/span><span class=\"p\">([<\/span>\r\n      <span class=\"p\">{<\/span> <span class=\"na\">path<\/span><span class=\"p\">:<\/span> <span class=\"dl\">''<\/span><span class=\"p\">,<\/span> <span class=\"na\">component<\/span><span class=\"p\">:<\/span> <span class=\"nx\">ProductListComponent<\/span> <span class=\"p\">},<\/span>\r\n      <span class=\"p\">{<\/span> <span class=\"na\">path<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">products\/:productId<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"na\">component<\/span><span class=\"p\">:<\/span> <span class=\"nx\">ProductDetailsComponent<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">])<\/span>\r\n  <span class=\"p\">],<\/span>\r\n  <span class=\"na\">declarations<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"nx\">AppComponent<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nx\">TopBarComponent<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nx\">ProductListComponent<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nx\">ProductAlertsComponent<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nx\">ProductDetailsComponent<\/span>\r\n  <span class=\"p\">],<\/span>\r\n  <span class=\"na\">bootstrap<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nx\">AppComponent<\/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\">AppModule<\/span> <span class=\"p\">{}<\/span>\r\n<\/code><\/pre>\n<h3>\u7ed9\u951a\u70b9\u6dfb\u52a0\u8def\u7531\u94fe\u63a5<\/h3>\n<p>\u4f7f\u7528product.id\u4f5c\u4e3a\u53c2\u6570\uff0c\u5728\u5546\u54c1\u540d\u79f0\u4e2d\u6dfb\u52a0\u94fe\u63a5\u3002RouteLink\u6307\u4ee4\u53ef\u4ee5\u901a\u8fc7\u63a5\u6536\u8def\u5f84\u6570\u7ec4\u6765\u52a8\u6001\u66f4\u6539\u94fe\u63a5\uff08\u53c2\u6570\u4e5f\u53ef\u4ee5\u5305\u542b\u5728\u6570\u7ec4\u4e2d\u4f20\u9012\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngFor=<\/span><span class=\"s\">\"let product of products\"<\/span><span class=\"nt\">&gt;<\/span>\r\n  <span class=\"nt\">&lt;h3&gt;<\/span>\r\n    <span class=\"nt\">&lt;a<\/span> <span class=\"na\">[title]=<\/span><span class=\"s\">\"product.name + ' details'\"<\/span> <span class=\"na\">[routerLink]=<\/span><span class=\"s\">\"['\/products', product.id]\"<\/span><span class=\"nt\">&gt;<\/span>\r\n      {{ product.name }}\r\n    <span class=\"nt\">&lt;\/a&gt;<\/span>\r\n  <span class=\"nt\">&lt;\/h3&gt;<\/span>\r\n...\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4e0a\u8ff0\u4fee\u6b63\uff0c\u53ef\u4ee5\u786e\u8ba4\u5f53\u70b9\u51fb\u4ea7\u54c1\u540d\u79f0\u65f6\u4f1a\u8fdb\u884c\u9875\u9762\u8df3\u8f6c\u3002<\/p>\n<h2>\u67e5\u770b\u5546\u54c1\u8be6\u60c5<\/h2>\n<h3>1. \u5c5e\u6027\u7684\u5b9a\u4e49 de<\/h3>\n<p>\u5bfc\u5165 products \u6570\u7ec4\uff0c\u5e76\u5b9a\u4e49 product \u5c5e\u6027\u3002<\/p>\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<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">ActivatedRoute<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/router<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Product<\/span><span class=\"p\">,<\/span> <span class=\"nx\">products<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">..\/products<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">ProductDetailsComponent<\/span> <span class=\"k\">implements<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nl\">product<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Product<\/span><span class=\"o\">|<\/span><span class=\"kc\">undefined<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"cm\">\/* ... *\/<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>2. @\u6fc0\u6d3b\u8def\u7531<\/h3>\n<p>\u5229\u7528 Angular Router\uff0c\u5e76\u7ed3\u5408\u4ea7\u54c1\u6570\u636e\u548c\u8def\u7531\u4fe1\u606f\uff0c\u663e\u793a\u6bcf\u4e2a\u5546\u54c1\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u9996\u5148\u4ece @angular\/router \u4e2d\u5bfc\u5165 ActivatedRoute\uff0c\u5728 constructor() \u4e2d\u6ce8\u5165\u5b83\u3002<\/p>\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<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">ActivatedRoute<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/router<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Product<\/span><span class=\"p\">,<\/span> <span class=\"nx\">products<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">..\/products<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">ProductDetailsComponent<\/span> <span class=\"k\">implements<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nl\">product<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Product<\/span><span class=\"o\">|<\/span><span class=\"kc\">undefined<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"kd\">constructor<\/span><span class=\"p\">(<\/span>\r\n    <span class=\"k\">private<\/span> <span class=\"nx\">route<\/span><span class=\"p\">:<\/span> <span class=\"nx\">ActivatedRoute<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"p\">)<\/span> <span class=\"p\">{<\/span> <span class=\"p\">}<\/span>\r\n\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5c06\u670d\u52a1\u6ce8\u5165\u7ec4\u4ef6\u540e\uff0c\u7ec4\u4ef6\u5c31\u80fd\u770b\u5230\u670d\u52a1\u3002\u56e0\u6b64\uff0c\u901a\u8fc7\u6ce8\u5165 ActivatedRoute\uff0c\u7ec4\u4ef6\u80fd\u8f7b\u677e\u83b7\u53d6\u6709\u5173\u81ea\u5df1\u8def\u7531\u7684\u4fe1\u606f\u3002\uff08\u6211\u7406\u89e3\u670d\u52a1\u6ce8\u5165\u7684\u597d\u5904\u662f\u80fd\u65b9\u4fbf\u5730\u5728\u7ec4\u4ef6\u5185\u4f7f\u7528\u5404\u79cd\u529f\u80fd\u3002\u5bf9\u4e8e\u6ce8\u5165\u76f8\u5173\u7684\u7406\u89e3\u8fd8\u6bd4\u8f83\u6d45\uff0c\u5982\u679c\u6709\u9519\u8bef\uff0c\u8bf7\u4e00\u5b9a\u6307\u6b63\u3002\uff09<\/p>\n<h3>3. ngOnInit() \u65b9\u6cd5<\/h3>\n<p>\u5728Angular\u4e2d\uff0c\u5b58\u5728\u53ef\u4ee5\u5728\u4e0e\u7ec4\u4ef6\u7684\u521b\u5efa\u3001\u66f4\u65b0\u548c\u9500\u6bc1\u76f8\u5173\u7684\u751f\u547d\u5468\u671f\u65f6\u673a\u4e0a\u6267\u884c\u7684\u65b9\u6cd5\u3002ngOnInit()\u65b9\u6cd5\u662f\u5728\u7ec4\u4ef6\u521b\u5efa\u4e4b\u540e\u88ab\u8c03\u7528\u7684\u65b9\u6cd5\u3002\u5b83\u770b\u8d77\u6765\u7c7b\u4f3c\u4e8econstructor()\u65b9\u6cd5\uff0c\u4f46constructor()\u65b9\u6cd5\u662f\u5728\u7ec4\u4ef6\u521b\u5efa\u8fc7\u7a0b\u4e2d\u88ab\u8c03\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\uff0c\u4f7f\u7528route.snapshot.paramMap\u5bf9\u8c61\u7684get()\u65b9\u6cd5\u83b7\u53d6productId\uff0c\u5e76\u4f7f\u7528find()\u51fd\u6570\u4eceproducts\u6570\u7ec4\u4e2d\u83b7\u53d6\u76f8\u5e94\u7684\u5546\u54c1\u3002ActivatedRoute\u7684\u5c5e\u6027\u53ef\u901a\u8fc7\u53c2\u8003ActivatedRoute\u6765\u83b7\u53d6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">ngOnInit<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"c1\">\/\/ First get the product id from the current route.<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">routeParams<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">route<\/span><span class=\"p\">.<\/span><span class=\"nx\">snapshot<\/span><span class=\"p\">.<\/span><span class=\"nx\">paramMap<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">productIdFromRoute<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">Number<\/span><span class=\"p\">(<\/span><span class=\"nx\">routeParams<\/span><span class=\"p\">.<\/span><span class=\"kd\">get<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">productId<\/span><span class=\"dl\">'<\/span><span class=\"p\">));<\/span>\r\n\r\n  <span class=\"c1\">\/\/ Find the product that correspond with the id provided in route.<\/span>\r\n  <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">product<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">products<\/span><span class=\"p\">.<\/span><span class=\"nx\">find<\/span><span class=\"p\">(<\/span><span class=\"nx\">product<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">product<\/span><span class=\"p\">.<\/span><span class=\"nx\">id<\/span> <span class=\"o\">===<\/span> <span class=\"nx\">productIdFromRoute<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u6211\u5c1d\u8bd5\u5728constructor()\u4e2d\u8fd0\u884cngOnInit()\u65b9\u6cd5\u7684\u5904\u7406\u903b\u8f91\uff0c\u7ed3\u679c\u6ca1\u6709\u95ee\u9898\u3002\u5177\u4f53\u7684\u4f7f\u7528\u533a\u522b\u6211\u60f3\u4e0d\u8d77\u6765\uff0c\u5982\u679c\u60a8\u77e5\u9053\uff0c\u8bf7\u544a\u8bc9\u6211\u3002<\/p>\n<h3>4. \u5c55\u793a\u5546\u54c1\u7684\u8be6\u7ec6\u4fe1\u606f<\/h3>\n<p>\u4f7f\u7528 *ngIf \u5224\u65ad\u5546\u54c1\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u5b58\u5728\u5219\u66f4\u65b0\u6a21\u677f\u4ee5\u663e\u793a\u5546\u54c1\u7684\u540d\u79f0\u3001\u4ef7\u683c\u548c\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nt\">&lt;h2&gt;<\/span>Product Details<span class=\"nt\">&lt;\/h2&gt;<\/span>\r\n\r\n<span class=\"nt\">&lt;div<\/span> <span class=\"na\">*ngIf=<\/span><span class=\"s\">\"product\"<\/span><span class=\"nt\">&gt;<\/span>\r\n  <span class=\"nt\">&lt;h3&gt;<\/span>{{ product.name }}<span class=\"nt\">&lt;\/h3&gt;<\/span>\r\n  <span class=\"nt\">&lt;h4&gt;<\/span>{{ product.price | currency }}<span class=\"nt\">&lt;\/h4&gt;<\/span>\r\n  <span class=\"nt\">&lt;p&gt;<\/span>{{ product.description }}<span class=\"nt\">&lt;\/p&gt;<\/span>\r\n\r\n<span class=\"nt\">&lt;\/div&gt;<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e2d\u6587\u7684\u8868\u8fbe\u65b9\u5f0f\uff1a<\/p>\n<h4>{{ product.price | currency }}<\/h4>\n<p>\u662f\u901a\u8fc7\u4f7f\u7528 currency \u7ba1\u9053\u5c06\u6570\u5b57\u8f6c\u6362\u4e3a\u8d27\u5e01\u5b57\u7b26\u4e32\u3002\u8fd9\u662f\u7528\u4e8e\u7f8e\u5143\u7684\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u592a\u8fc7\u8bb0\u4f4f\u3002\u7ba1\u9053\u53ef\u80fd\u4f1a\u7ecf\u5e38\u7528\u5230\uff0c\u6240\u4ee5\u6700\u597d\u8bb0\u4f4f\u3002<\/p>\n<h1>\u6700\u540e<\/h1>\n<p>\u6211\u8fdb\u884c\u4e86\u8def\u7531\u8bbe\u7f6e\u3002\u53ea\u9700\u8981\u8bbe\u7f6e\u94fe\u63a5\u548c\u76f8\u5e94\u7684\u7ec4\u4ef6\uff0c\u7136\u540e\u53ea\u9700\u5728\u951a\u70b9\u4e0a\u6dfb\u52a0\u94fe\u63a5\uff0c\u975e\u5e38\u7b80\u6d01\u660e\u4e86\u3002\u6211\u5e0c\u671b\u80fd\u591f\u7ee7\u7eed\u6df1\u5165\u7406\u89e3Angular\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u6211\u9075\u5faaAngular\u516c\u5f0f\u6587\u6863\u4e86\u89e3\u4e86Angular\u57fa\u672c\u7ed3\u6784\uff0c\u5728Angular\u7406\u89e3\u2460\u4e2d\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u7ee7\u7eed\u6309\u7167 [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38986","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u9075\u5faaAngular\u516c\u5f0f\u6587\u6863\u5b66\u4e60\u7406\u89e3Angular 2 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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