用于淡入淡出 View 的 Angular 4 动画

Question

我只想让 View 在路线更改时淡入淡出。我似乎已经正确设置了组件，但我认为需要正确设置动画语法。

这是我目前的动画尝试。 我将此动画导入我的组件:

import {trigger, state, animate, style, transition} from '@angular/animations';

export function routerTransition() {
  return fadeInAndOut();
}

function fadeInAndOut() {
  return trigger('routerTransition', [
    transition(':enter', [
      style({opacity: 0}),
      animate(3000, style({opacity: 1}))
    ]),
    transition(':leave', [
      animate(3000, style({opacity: 0}))
    ])
  ]);
}

这是我导入转换的组件之一:

import { Component } from "@angular/core";
import { routerTransition } from "../../animations/fade.animation";

@Component({
  selector: "about-users",
  templateUrl: "./about.component.html",
  animations: [routerTransition()],
  host: { '[@routerTransition]': '' } 
})

export class AboutComponent {  
  constructor() {
  }
}

Answer 1

这对我来说适用于路由动画:

typescript :

  ....
   animations: [
    trigger('routerTransition', [
      transition('* <=> *', [    
        query(':enter, :leave', style({ position: 'fixed', opacity: 1 })),
        group([ 
          query(':enter', [
            style({ opacity:0 }),
            animate('1000ms ease-in-out', style({ opacity:1 }))
          ]),
          query(':leave', [
            style({ opacity:1 }),
            animate('1000ms ease-in-out', style({ opacity:0 }))]),
        ])
      ])
    ])
   ]

HTML:

<nav>
  <a routerLink="/page1" routerLinkActive="active">Page1</a>
  <a routerLink="/page2" routerLinkActive="active">Page2</a>
</nav>
<br><br>
<main [@routerTransition]="page.activatedRouteData.state">
  <router-outlet #page="outlet"></router-outlet>
</main>

DEMO