北京抖音微信小程序_angular4 怎么在全局设置路由

最近用angular4写项目需要为每次路由跳转增加动画，看了一下官方文档，虽然可以实现，但是要每个组件都引入一次animations，比较麻烦，找网上也查阅了很多资料，但是都没找到适用的方法，最后自己写了一种方法如下：

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/下创建一个animations.ts。内容如下，这里我用到query和group是想两个页面来回切换有过度痕迹

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 })

import { Router, NavigationEnd } from '@angular/router';
import { routeAnimation } from './animations';
@Component({
 selector: 'app-root',
 ',
 styleUrls: ['./ponent.less'],
 animations: [routeAnimation]
// router跳转动画所需参数
 routerState: boolean = true;
 routerStateCode: string = 'active';
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';

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