Angular 中的路由

1 使用 routerLink 指令 路由跳转

1. 命令创建项目：

ng new ng-demo
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2. 创建需要的组件：

ng g component components/home
ng g component components/news
ng g component components/produect
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3. 找到 app-routing.module.ts 配置路由:
   引入组件:

import { HomeComponent } from './components/home/home.component';
import { NewsComponent } from './components/news/news.component';
import { ProductComponent } from './components/product/product.component';
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配置路由:

const routes: Routes = [
  {path: 'home', component: HomeComponent},
  {path: 'news', component: NewsComponent},
  {path: 'product', component: ProductComponent},
  {path: '**', redirectTo: 'home'}
];
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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" routerLinkActive="active">首页</a>
  <a routerLink="/news" routerLinkActive="active">新闻</a>
</h1>
<router-outlet></router-outlet>
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routerLink 跳转页面默认路由:

//匹配不到路由的时候加载的组件 或者跳转的路由
{path: '**', redirectTo: 'home'}
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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>

.active {
  color: green;
}
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<h1>
    <a [routerLink]="[ '/home' ]" routerLinkActive="active">首页</a>
    <a [routerLink]="[ '/news' ]" routerLinkActive="active">新闻</a>
</h1>

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2 使用方法跳转路由 - 使用 router.navigate 方法

在组件中注入 Router 服务，并使用 navigate 方法进行路由跳转：

import { Component } from '@angular/core';
import { Router} from "@angular/router";

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  title = 'routerProject';
  constructor(public router: Router) {
  }

  goToPage(path: string) {
    this.router.navigate([path]).then(r => {})
  }
}
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<h1>
  <button (click)="goToPage('home')">首页</button>
  <button (click)="goToPage('news')">新闻</button>
</h1>
<router-outlet></router-outlet>
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3 routerLink跳转页面传值 - GET传值的方式

1. 页面跳转 - queryParams属性是固定的：

<h1>
  <a routerLink="/home" routerLinkActive="active" [queryParams]="{name: 'index'}">首页</a>
  <a routerLink="/news" routerLinkActive="active" [queryParams]="{name: 'news'}">新闻</a>
</h1>
<router-outlet></router-outlet>
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2. 获取参数方式：

import {Component, OnInit} from '@angular/core';
import {ActivatedRoute} from "@angular/router";

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.scss']
})
export class HomeComponent implements OnInit{
  constructor(public activatedRoute: ActivatedRoute) {
  }

  ngOnInit(): void {
    this.activatedRoute.queryParams.subscribe(data => {
      console.log(data)
    })
  }
}
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4 使用方法跳转页面传值 - GET传值的方式

<h1>
    <button (click)="goToPage('home', 'home')">首页</button>
    <button (click)="goToPage('news', 'news')">新闻</button>
</h1>
<router-outlet></router-outlet>

import { Component } from '@angular/core';
import { Router} from "@angular/router";

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  title = 'routerProject';
  constructor(public router: Router) {
  }

  goToPage(path: string, param: string) {
    this.router.navigate([path], {
      queryParams: {
        name: param
      }
    }).then(r => {})
  }
}
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5 动态路由的方式-路由跳转

1. 配置路由文件：

import {NgModule} from '@angular/core';
import {RouterModule, Routes} from '@angular/router';

import {HomeComponent} from "./components/home/home.component";
import {NewsComponent} from "./components/news/news.component";
import {ProductComponent} from "./components/product/product.component";

const routes: Routes = [
  {path: 'home/:id', component: HomeComponent},
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule {
}
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2. 页面设置参数：

<h1>
  <a [routerLink]="['/home', '1000']" routerLinkActive="active">首页</a>
</h1>
<router-outlet></router-outlet>
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3. 参数接受：

import {Component, OnInit} from '@angular/core';
import {ActivatedRoute} from "@angular/router";

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.scss']
})
export class HomeComponent implements OnInit{
  constructor(public activatedRoute: ActivatedRoute) {
  }

  ngOnInit(): void {
    this.activatedRoute.params.subscribe(data => {
      console.log(data)
    })
  }
}

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6 父子路由

1. 创建组件引入组件

import {HomeComponent} from "./components/home/home.component";
import {NewsComponent} from "./components/news/news.component";
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2. 配置路由

import {NgModule} from '@angular/core';
import {RouterModule, Routes} from '@angular/router';

import {HomeComponent} from "./components/home/home.component";
import {NewsComponent} from "./components/news/news.component";

const routes: Routes = [
  {
    path: 'home',
    component: HomeComponent,
    children: [
      {
        path: 'news',
        component: NewsComponent
      },
      {path: '**', redirectTo: 'home'}
    ]
  },
  {path: '**', redirectTo: 'home'}
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule {

}

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3. 父组件中定义router-outlet

<router-outlet></router-outlet>
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