angular路由

angular创建一个默认带路由的项目

1.创建项目命令

ng new angualrdemo08 --skip-install

 

2.创建需要的组件

ng g component home
ng g component news
ng g component newscontent

 

3.找到app-routing.module.ts配置路由

引入组件

import { HomeComponent } from './home/home.component';
import { NewsComponent } from './news/news.component';
import { NewscontentComponent } from './newscontent/newscontent.component';

配置路由

const routes: Routes = [
{path: 'home', component: HomeComponent},
{path: 'news', component: NewsComponent},
{path: 'newscontent/:id', component: NewscontentComponent},
{
path: '',
redirectTo: '/home',
pathMatch: 'full'
}
];

4. 找到 app.component.html 根组件模板 ，配置 router-outlet 显示动态加载的路由

<h1>
<a routerLink="/home">首页</a>    <--点击会替换router-outlet标签!-->
<a routerLink="/news">新闻</a>
</h1>
<router-outlet></router-outlet>     <--可以简单理解为：页面的占位符，动态加载，会被替换掉的。!-->

让路由可用

引入 RouterModule，即把 RouterModule 添加到 AppModule 的imports 数组中。

三、Angular routerLinkActive 设 置
routerLink 默认选中路由

<h1>
<a routerLink="/home" routerLinkActive="active">首页</a>
<a routerLink="/news" routerLinkActive="active">新闻</a>
</h1>

<h1>
<a [routerLink]="[ '/home' ]" routerLinkActive="active">首页</a>
<a [routerLink]="[ '/news' ]" routerLinkActive="active">新闻</a>
</h1>

四 、动态路由

1.配置动态路由

const routes: Routes = [
{path: 'home', component: HomeComponent},
{path: 'news', component: NewsComponent},
{path: 'newscontent/:id', component: NewscontentComponent},
{
path: '',
redirectTo: '/home',
pathMatch: 'full'
}
];

2. 跳转传值

<a [routerLink]="[ '/newscontent/',aid]">跳转到详情</a>
<a routerLink="/newscontent/{{aid}}">跳转到详情</a>

3. 获取动态路由的值

import { ActivatedRoute} from '@angular/router';

constructor( private route: ActivatedRoute) {
}

ngOnInit() {
console.log(this.route.params);
this.route.params.subscribe(data=>this.id=data.id);
}

五 、 动态 路由的 js 跳转

1.引入

import { Router } from '@angular/router';

2.初始化

export class HomeComponent implements OnInit {
constructor(private router: Router) {
}
ngOnInit() {
}
goNews(){
// this.router.navigate(['/news', hero.id]);
this.router.navigate(['/news']);
}
}

3. 路由跳转

this.router.navigate(['/news', hero.id]);

六 、路由 get 传值 js 跳转

1. 引入 NavigationExtras

import { Router ,NavigationExtras} from '@angular/router';

2. 定义一个 goNewsContent 方法执行跳转 ，用 用 NavigationExtras 配置传参 

goNewsContent(){
let navigationExtras: NavigationExtras = {
queryParams: { 'session_id': '123' },
fragment: 'anchor'
};
this.router.navigate(['/news'],navigationExtras);
}

3. 获取 get 传值

constructor(private route: ActivatedRoute) {
console.log(this.route.queryParams);
}

七 、父子路由

1. 创建组件引入组件

import { NewsaddComponent } from './components/newsadd/newsadd.component';
import { NewslistComponent } from './components/newslist/newslist.component';

2. 配置路由

{
path: 'news',
component:NewsComponent,
children: [
{
path:'newslist',
component:NewslistComponent
},
{
path:'newsadd',
component:NewsaddComponent
}
]
}

3. 父组件中定义 router-outlet

<router-outlet></router-outlet>