Angular Animations:如何在模板中动态绑定动画触发器名称? [英] Angular Animations : How to bind animation trigger name dynamically in the template?

问题描述

我想知道是否可以在模板中动态绑定动画触发器名称.

I would like to know if there is a way to bind the animation trigger name dynamically in the template.

这是要在模板 app.component.html 中设置动画的div:

Here is the div to animate in the template app.component.html:

<div [@animationTriggerName]>
  ...
</div>

这是 app.module.ts :

...
@NgModule({
  imports:      [...],
  declarations: [ ..., AnimationTriggerNameDirective ],
  bootstrap:    [...]
})

这是 app.component.ts :

@Component({
  ...
})
export class AppComponent  {
  ...
  animationTriggerName = 'slideInOut';
}

@Directive({
  selector: '[animationTriggerName]'
})
export class AnimationTriggerNameDirective {
  @Input() animationTriggerName: string;
  constructor() {}
}

我希望能够动态设置变量 animationTriggerName . 因此，如果我将其设置为 myTriggerName ，则在模板中将呈现此内容:

I want to be able to set the variable animationTriggerName dynamically. So if I set it to myTriggerName, then in the template I would have this rendered :

<div [@myTriggerName]>
  ...
</div>

因此触发名称为 myTriggerName 的动画就可以运行.

And so the animation whose trigger name is myTriggerName would be able to run.

推荐答案

.看起来使用多个状态比使用触发器名称更容易，所以我像下面那样更改我的代码结构，下面是供您参考的原始帖子 https://angularfirebase.com/lessons/hammerjs-angular-5-animations-for-mobile-gestures-tutorial/

after I learn from this post. it looks like use multiple states is much eaiser than using trigger name, so I change my code structure like below, below is the original post for your reference https://angularfirebase.com/lessons/hammerjs-angular-5-animations-for-mobile-gestures-tutorial/

@Component({
  selector: 'hammer-card',
  templateUrl: './hammer-card.component.html',
  styleUrls: ['./hammer-card.component.sass'],
  animations: [
    trigger('cardAnimator', [
      transition('* => wobble', animate(1000, keyframes(kf.wobble))),
      transition('* => swing', animate(1000, keyframes(kf.swing))),
      transition('* => jello', animate(1000, keyframes(kf.jello))),
      transition('* => zoomOutRight', animate(1000, keyframes(kf.zoomOutRight))),
      transition('* => slideOutLeft', animate(1000, keyframes(kf.slideOutLeft))),
      transition('* => rotateOutUpRight', animate(1000, keyframes(kf.rotateOutUpRight))),
      transition('* => flipOutY', animate(1000, keyframes(kf.flipOutY))),
    ])
  ]
})

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