Angular 2/4 + Router动画，等待上一个路线动画完成 [英] Angular 2/4+ Router animation, wait for previous route animation to complete

问题描述

我在两条路线上配置了以下动画。

I have the following animation configured on 2 of my routes.

trigger('routeAnimation', [
        transition(':enter', [
            style({ opacity: 0 }),
            animate('1s', style({ backgroundColor: 1 }))
        ]),
        transition(':leave', [
            style({ backgroundColor: 1 }),
            animate('1s', style({ backgroundColor: 0 }))
        ]),
    ]),

它们正常工作。从路由A切换到B时，两者都将执行。但是它们同时执行。我想让TO路线等待FROM路线的退出动画完成之后再进入。

They work properly. Both get executed when switching from route A to B. However they execute simultaneously. I would like for the TO route to wait for the FROM route's exit animation to finish before coming in.

我希望A在B进入之前完全消失。

I want A to completely fade out before B comes in.

有可能吗？也许有生命周期挂钩之类的东西？

Is that possible? Maybe with lifecycle hooks or something?

推荐答案

要在进入路线的动画开始之前等待离开路线的动画完成：

To wait for the leaving route's animation to finish before the entering route's animation begins:

const fadeIn = [
  query(':leave', style({ opacity:1 })),
  query(':enter', style({ opacity:0 })),
  query(':leave', animate('200ms', style({ opacity:0 }))),
  query(':enter', animate('200ms', style({ opacity:1 })))
]

...

trigger('routerAnimations', [
      transition('route1 => route2', fadeIn)
]

动画将按顺序播放。

（在建议将进入路线推迟到离开路线的持续时间后进行更新，从而导致冗长的解决方案）

(Updated after suggesting to delay the entering route by the duration of the leaving route, leading to a verbose solution)

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