angular4 如何在全局设置路由跳转动画

最近用angular4写项目须要为每次路由跳转增长动画,看了一下官方文档,虽然能够实现,可是要每一个组件都引入一次animations,比较麻烦,找网上也查阅了不少资料,可是都没找到适用的方法,最后本身写了一种方法以下:html


首先在app.module中导入BrowserAnimationsModule

import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

@NgModule({
  imports: [
    BrowserAnimationsModule

在根目录src/app/下建立一个animations.ts。内容以下,这里我用到query和group是想两个页面来回切换有过分痕迹

import { AnimationEntryMetadata, state } from '@angular/core';
import { trigger, transition, animate, style, query, group } from '\@angular/animations';

export const routeAnimation: AnimationEntryMetadata =
  trigger('routeAnimation', [
    transition(':enter', [
      style({
        position: 'absolute'
      }),
      animate('0.5s ease-in-out')
    ]),
    transition('* => *', [
      query(':leave', style({ transform: 'translateX(0)', position: 'absolute'}), { optional: true }),
      query(':enter', style({ transform: 'translateX(100%)', position: 'absolute'}), { optional: true }),

      group([
        query(':leave', animate('.5s ease-in-out', style({transform: 'translateX(-100%)'})), { optional: true }),
        query(':enter', animate('.5s ease-in-out', style({transform: 'translateX(0)'})), { optional: true })
      ])
    ])
  ]);

接着在app.component中使用 NavigationEnd 设置每次路由跳转监听的参数变化而且引入animations模块

import { Router, NavigationEnd } from '@angular/router';
import { routeAnimation } from './animations';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.less'],
  animations: [routeAnimation]
})
export class AppComponent {
    // router跳转动画所需参数
    routerState:boolean = true;
    routerStateCode:string = 'active';
    constructor(private router:Router){
        this.router.events.subscribe(event => {
          if (event instanceof NavigationEnd) {
          // 每次路由跳转改变状态
          this.routerState = !this.routerState;
          this.routerStateCode = this.routerState ? 'active' : 'inactive';
          }
        });
    }
}

最后在app.component.html中声明路由动画就能够了

<div id="app" [@routeAnimation]="routerStateCode">
  <router-outlet></router-outlet>
</div>

如今全局路由跳转都有动画了,不用一个一个组件导入animations。app

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