7

基本上,我想利用 angular 中的 web-animations-api polyfill(目前为 4 个)对元素执行无限动画。

让我们看一个基本的非角度示例:

var ball = document.getElementById('ball');

ball.animate([
  { transform: 'scale(0.5)' },
  { transform: 'scale(1)' }
], {
  duration: 1000,
  iterations: Infinity,
  direction: 'alternate',
  easing: 'ease-in-out'
});
.container {
  position: relative;
  width: 100%;
  height: 200px;
}

.ball {
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid #E57373;
  background: #F06292;
  box-shadow: 0px 0px 15px #F06292;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: auto;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/web-animations/2.2.5/web-animations.min.js"></script>
<div class="container">
  <div class="ball" id="ball"><div>
</div>

我如何将其翻译成 Angular?

这是我迄今为止尝试过的,但只能工作一次:

animations: [
  trigger('scale', [
    transition('* <=> *', animate('1s ease-in-out', keyframes([
      style({ transform: 'scale(0.5)' }),
      style({ transform: 'scale(1)' })
    ]))) // How do I specify the iterations, or the direction? 
  ])
]

有没有办法使用 @angular/animation 插件来做到这一点,而不是存储一个 ElementRef 并按照上面的示例进行操作?或者我误解了这个插件的用途?

提前致谢。

4

3 回答 3

19

我正在为我的项目搜索无限动画。中没有这方面的文档angular.io。所以我尝试了这种方式并花费了我很多时间来实现这一目标。希望它会帮助别人。首先animation在你的class.

animations: [
trigger('move', [
  state('in', style({transform: 'translateX(0)'})),
  state('out', style({transform: 'translateX(100%)'})),
  transition('in => out', animate('5s linear')),
  transition('out => in', animate('5s linear'))
]),
]

然后将其插入您的html

<div [@move]="state" (@move.done)="onEnd($event)"></div>

然后设置state = 'in'并在ngAfterViewInit()生命周期挂钩中,使用函数更新您的属性state值,并在结束回调函数后,将您的属性值更新为并检查您的属性值,如果然后通过这样的函数更新'out'setTimeoutstate'in'stateinoutsetTimeout

export class AppComponent implements AfterViewInit {
  state = 'in';
  ngAfterViewInit() {
    setTimeout(() => {
      this.state = 'out';
    }, 0);
  }
  onEnd(event) {
    this.state = 'in';
    if (event.toState === 'in') {
      setTimeout(() => {
        this.state = 'out';
      }, 0);
    }
  }
}

快乐编码:)

于 2017-09-14T07:09:23.627 回答
2

可以在 Angular 中实现无限动画,但没有多少,但这对我来说非常适合 onenter 和 onleave 动画。

当“mouseenter”动画循环播放时,它会在“mouseleave”处停止。

我正在使用 Angular 6。

Angular CLI:6.0.8 节点:8.9.3 操作系统:linux x64 Angular:6.1.4 ...动画,通用,编译器,编译器-cli,核心,表单... http,语言服务,平台浏览器.. . 平台-浏览器-动态、路由器

rxjs 6.2.2 打字稿 2.7.2 webpack 4.8.3


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

@Component({
  selector: 'hot-spot',
  templateUrl: './myComp.component.html',
  styleUrls: ['./myComp.component.css'],
  animations: [
    trigger('compState', [
      state('small', style({
        opacity: '0.5',
        transform: 'scale(0.8)'
      })),
      state('large', style({
        opacity: '1',
        transform: 'scale(1.2)'
      })),
      transition('small => large', animate('0.6s 100ms ease-in')),
      transition('large => small', animate('0.7s 100ms ease-out'))
    ]),
  ]
})
export class MyComponent {

  state: string = 'none';
  isEnter: boolean = false;


  onMouseEnter(evt: MouseEvent) {
    console.log('onMouseEnter()');
    this.state = 'small';
    this.isEnter = true;
  }

  onMouseLeave(evt: MouseEvent) {
    console.log('onMouseLeave()');
    this.state = 'large';
    this.isEnter = false;
  }

  onEnd(event) {
    if (this.isEnter) {
      if (event.toState === 'small') {
        this.state = 'large';
      }
      else {
        this.state = 'small';
      }
    }
  }

}

和 HTML

<div
  (mouseenter)="onMouseEnter($event)"
  (mouseleave)="onMouseLeave($event)">

  <div>
    <div
      [@compState]="state"
      (@compState.done)="onEnd($event)">

      <button
        (click)="onSceneClick($event,data.sceneId)"
        type="button"
        class="btn btn-link" >
        <i class="fa fa-angle-double-up" style="font-size:16pt;color:red">
          <br><span style="font-size:12pt">{{data.text}}</span>
        </i>

      </button>
    </div>
  </div>
于 2018-09-03T12:23:32.060 回答
1

您可以尝试WebComponents以声明方式使用Web Animations API(使用组件为任何 html 元素设置动画):

<!-- Add Web Animations Polyfill :) -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/web-animations/2.3.2/web-animations.min.js"></script>

<script type="module" src="https://unpkg.com/@proyecto26/animatable-component@1.0.0/dist/animatable-component/animatable-component.esm.js"></script>
<script nomodule="" src="https://unpkg.com/@proyecto26/animatable-component@1.0.0/dist/animatable-component/animatable-component.js"></script>

<animatable-component
  autoplay
  easing="ease-in-out"
  duration="800"
  delay="300"
  animation="zoomIn"
  iterations="Infinity"
  direction="alternate"
  style="display: flex;align-self: center;"
>
  <h1>Hello World</h1>
</animatable-component>

有很多已定义的动画,但您也可以使用关键帧创建自定义动画。

检查此处以将其与AngularReactVueJS等一起使用:https ://github.com/proyecto26/animatable-component#framework-integrations

于 2019-11-19T02:44:41.750 回答