如何在 Angular 2 中使用子路由 [英] How to use child routes in Angular 2

问题描述

Angular 2 版本:2.0.0-alpha.44

我一直在尝试在 Angular 2 中进行路由.虽然我能够完成正常的路由，但在引入子路由时我遇到了一些问题.这是 plnkr 的示例 (http://plnkr.co/edit/Y5doqU1WcEe4Ldr7KfPJ)

以下是快速参考的代码.我正在尝试实现以下路由

 应用程序/\/\HomeCmp HelloCmp\\儿童Cmp

下面是我如何配置我的路径

从 'angular2/angular2' 导入 {bootstrap, bind, Component, View}从angular2/router"导入 {RouteConfig, RouteParams, ROUTER_DIRECTIVES, APP_BASE_HREF, ROUTER_BINDINGS}@成分({选择器:'child-cmp'})@看法({模板:`<div><h3>怎么了</h3>

`})类 ChildCmp { }//************************ 你好组件 *************************************@成分({选择器:'你好-cmp'})@看法({模板:`<div><h2>你好！</h2><路由器插座></路由器插座>

`，指令:ROUTER_DIRECTIVES})@RouteConfig([{路径:'/'，组件:ChildCmp，如:'ChildCmp'}])类 HelloCmp { }//**************************** HOME 组件 ***********************************@成分({选择器:'home-cmp'})@看法({模板:`<div><h2>欢迎回家</h2>

`})类 HomeCmp {}//**************************** APP组件************************************@成分({选择器:'app-cmp'})@看法({模板:`<div><h1>你好{{message}}！</h1><a [router-link]="['./HomeCmp']">home</a><a [router-link]="['./HelloCmp']">hello</a><小时><路由器插座></路由器插座>

`，指令:ROUTER_DIRECTIVES})@RouteConfig([{路径:'/'，组件:HomeCmp，如:'HomeCmp'}{path: '/hello/...', 组件: HelloCmp, as: 'HelloCmp'}])出口类应用{消息:字符串 = '世界';}引导程序(应用程序，[ROUTER_BINDINGS，绑定(APP_BASE_HREF).toValue(location.pathname)]);

当我删除子路由时，它工作正常.但是对于子路由，我得到以下错误.

例外:链接 "["HelloCmp"]" 无法解析为终端或异步指令.在 [空]

我关注了这里提到的文章.但无法让它工作.有人可以帮忙吗?谢谢

解决方案

您只需要在 routerLink 中导入子组件，然后您的代码就可以正常工作了.例如:

<a [routerLink]="['./HelloCmp','ChildCmp']">hello</a>

这是您的代码的工作 plnkur.Plunker 代码

有关此路由的更多信息，请参阅 github 上的此问题 此处

更新到 Angular 2 测试版

从 Angular 2 beta 开始，这里有一些变化:

• router-link 已更改为 routerLink

• 你也可以使用 useAsDefault : true 而不是像这样在 routerLink 的时候提供 child -

  {path: '/blabla', components: ABC , name : ABC, useAsDefault: true}

Angular 2 version: 2.0.0-alpha.44

I've been trying to do routing in Angular 2. Though i was able to do the normal routing done, i am facing some issues when i introduce child routes. Here is the example on plnkr (http://plnkr.co/edit/Y5doqU1WcEe4Ldr7KfPJ)

Below is the code for quick reference. I am trying to achieve below routing

                                  App
                                  /\
                                 /  \
                             HomeCmp HelloCmp
                                      \
                                       \
                                     ChildCmp

And below is how i've configured my paths

import {bootstrap, bind, Component, View} from 'angular2/angular2'
import {RouteConfig, RouteParams, ROUTER_DIRECTIVES, APP_BASE_HREF, ROUTER_BINDINGS} from 'angular2/router'

@Component({
  selector: 'child-cmp'
})
@View({
  template: `
    <div>
      <h3>Whats up</h3>
    </div>
  `
})
class ChildCmp { }

// ************************ Hello Component ***********************************
@Component({
  selector: 'hello-cmp'
})
@View({
  template: `
    <div>
      <h2>Hello there !</h2>
      <router-outlet></router-outlet>
    </div>
  `,
  directives: ROUTER_DIRECTIVES
})
@RouteConfig([
  {path: '/', component: ChildCmp, as: 'ChildCmp'}
])
class HelloCmp { }

//************************** HOME Component ***********************************
@Component({
  selector: 'home-cmp'
})
@View({
  template: `
    <div>
      <h2>Welcome Home</h2>
    </div>
  `
})
class HomeCmp {}

//************************* APP Component *************************************
@Component({
  selector: 'app-cmp'
})
@View({
  template: `
    <div>
      <h1>Hello {{message}}!</h1>
      <a [router-link]="['./HomeCmp']">home</a>
      <a [router-link]="['./HelloCmp']">hello</a>
      <hr>
      <router-outlet></router-outlet>
    </div>
  `,
  directives: ROUTER_DIRECTIVES
})
@RouteConfig([
  {path: '/', component: HomeCmp, as: 'HomeCmp'}
  {path: '/hello/...', component: HelloCmp, as: 'HelloCmp'}
])
export class App {
  message:string = 'world';
}

bootstrap(App, [
  ROUTER_BINDINGS,
  bind(APP_BASE_HREF).toValue(location.pathname)
]);

When i remove child routes it works fine. But with child routes i get below error.

EXCEPTION: Link "["HelloCmp"]" does not resolve to a terminal or async instruction. in [null]

I followed the article mentioned here. But not able to get it working. Can someone please help ? Thanks

解决方案

You just need to import the child component in the routerLink then your code is working fine. For example:

<a [routerLink]="['./HelloCmp','ChildCmp']">hello</a>

Here is the working plnkur of your code. Plunker Code

For more info about this routing see this issue on github here

Update to Angular 2 beta

As of Angular 2 beta some changes are here:

• router-link has been changed to routerLink

• You can also use useAsDefault : true instead of providing child at the time of routerLink like this -

  {path: '/blabla', components: ABC , name : ABC, useAsDefault: true}

这篇关于如何在 Angular 2 中使用子路由的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！