Angular 默认子路由不加载父组件

Question

我正在构建一个 angular 5 应用程序，但我在使用路线时遇到了问题...

我有 2 个主布局，每个都有它们的子路由，如下所示：

SiteLayoutComponent - 主页组件 AppLayout组件 - 联系组件

我的问题是默认路由，当应用程序第一次加载时，空 URL，路由器必须重定向到具有子路由 "SiteLayoutComponent" 的 Home Component，这里的问题是它只加载 HomeComponent 而不是 "SiteLayoutComponent"，它有一个 <navbar-component>。它仅在浏览器输入 /home 时有效。以下是我的路线：

const appRoutes: Routes = [

{
    path: '',
    redirectTo: 'home',
    pathMatch: 'full'
},
//Site routes goes here        
{
    path: 'home',
    component: SiteLayoutComponent,
    children: [
        { 
            path: '', 
            component: HomeComponent 
        }
    ]
},
//App routes goes here
{
    path: 'app',
    component: AppLayoutComponent,
    children: [
        { path: 'contact', component: ContactComponent }
    ]
},
//No layout routes    
{
    path: '**', redirectTo: 'home'
}

];

export const routing = RouterModule.forRoot(appRoutes, { enableTracing: true });

它应该显示带有 SiteLayoutComponent（包含导航栏）的 HomeComponent，但它只在键入 URL 如“http://localhost:4200/home”时显示 SiteLayoutComponent（包含导航栏）。

SiteLayoutComponent

<layout-site-navbar></layout-site-navbar>
<router-outlet></router-outlet>

SiteNavbarComponent

<nav class="navbar navbar-default">
<div class="container-fluid">
  <!-- Brand and toggle get grouped for better mobile display -->
  <div class="navbar-header">
    <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
      <span class="sr-only">Toggle navigation</span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
    </button>
    <a class="navbar-brand" href="#">Brand</a>
  </div>

  <!-- Collect the nav links, forms, and other content for toggling -->
  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
    <ul class="nav navbar-nav">
      <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li>
      <li><a href="#">Link</a></li>
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
        <ul class="dropdown-menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">One more separated link</a></li>
        </ul>
      </li>
    </ul>
    <form class="navbar-form navbar-left">
      <div class="form-group">
        <input type="text" class="form-control" placeholder="Search">
      </div>
      <button type="submit" class="btn btn-default">Submit</button>
    </form>
    <ul class="nav navbar-nav navbar-right">
      <li><a href="#">Link</a></li>
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
        <ul class="dropdown-menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </li>
    </ul>
  </div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->

请帮帮我！提前致谢...

Answer 1

可能是因为 SiteLayoutComponent 和 HomeComponent 具有相同的路径，即 /home。
要么使用具有以下内容的组件

<layout-site-navbar></layout-site-navbar>
<h1>THIS IS THE HOME PAGE<h1>

或者像下面这样定义你的路线

{ path: 'home', component: SiteLayoutComponent,
    children: [
      { path: '', redirectTo: 'detail', pathMatch: 'full' },
      { path: 'detail', component: HomeComponent}
    ]
  }

看看 Defining Child Routes

Answer 2

假设您有一个要路由到的父级，它有一些要显示的信息，在这些信息下，您有两个组件要根据路由器配置一次显示一个。这就是我们可以做到的。空路径route是关键

`

{
    path: 'parent',
    component: ParentComponent,
    children: [
    {
        path: '',
        redirectTo: 'defaultChild',
        pathMatch: 'full'
    },
    {
        path: 'defaultChild',
        component: ChildComponent
    },
    {
        path: 'otherChild',
        component: OtherChildComponent
    }]
}

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