harmony 鸿蒙Component Animation

2022-08-09
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Component Animation

Create and run an animation shortcut on the component. For details, see Universal Methods.

Obtaining an Animation Object

Call the animate method to obtain an animation object, which supports animation attributes, methods, and events.

<!-- xxx.hml -->
<div class="container">
  <div id="content" class="box" onclick="Show"></div>
</div>

/* xxx.css */
.container {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
}
.box{
  width: 200px;
  height: 200px;
  background-color: #ff0000;
  margin-top: 30px;
}

/* xxx.js */
export default {
    data: {
        animation: '',
        options: {},
        frames: {}
    },
    onInit() {
        this.options = {
            duration: 1500,
        };
        this.frames = [
            {
                width: 200, height: 200,
            },
            {
                width: 300, height: 300,
            }
        ];
    },
    Show() {
        this.animation = this.$element('content').animate(this.frames, this.options); // Obtain the animation object.
        this.animation.play();
    }
}

en-us_image_0000001222807812

NOTE - When using the animate method, you must pass the keyframes and options parameters. - If animate is called multiple times and the replace policy is used, parameters passed to the last call will take effect.

Setting Animation Parameters

After obtaining an animation object, you can set its style working on the component by using the keyframes parameter.

<!-- xxx.hml -->
<div class="container">
   <div id="content" class="box" onclick="Show"></div>
</div>

/* xxx.css */
.container {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}
.box{
  width: 200px;
  height: 200px;
  background-color: #ff0000;
  margin-top: 30px;
}

/* xxx.js */
export default {
  data: {
    animation: '',
    keyframes:{},
    options:{}
  },
  onInit() {
    this.options = {
      duration: 4000,
    }
    this.keyframes = [
    {
      transform: {
        translate: '-120px -0px',   
        scale: 1,        
        rotate: 0
        },   
        transformOrigin: '100px 100px',  
        offset: 0.0, 
        width: 200,  
        height: 200   
      }, 
      {
        transform: {      
          translate: '120px 0px',     
          scale: 1.5,     
          rotate: 90   
          },
          transformOrigin: '100px 100px',
          offset: 1.0,
          width: 300,
          height: 300   
      }    
    ]
  },
  Show() {
    this.animation = this.$element('content').animate(this.keyframes, this.options)
    this.animation.play()
  }
}

en-us_image_0000001267647897

NOTE - The sequence of translate, scale, and rotate affects the animation effect.

transformOrigin works only for scale and rotate.

Set the animation attributes by using the options parameter.

<!-- xxx.hml -->
<div class="container">
   <div id="content" class="box" onclick="Show"></div>
</div>

/* xxx.css */
.container {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
}
.box{
  width: 200px;
  height: 200px;
  background-color: #ff0000;
  margin-top: 30px;
}

/* xxx.js */
export default {
    data: {
        animation: '',
        options: {},
        frames: {}
    },
    onInit() {
        this.options = {
            duration: 1500,
            easing: 'ease-in',
            delay: 5,
            iterations: 2,
            direction: 'normal',
        };
        this.frames = [
            {
                transform: {
                    translate: '-150px -0px'
                }
            },
            {
                transform: {
                    translate: '150px 0px'
                }
            }
        ];
    },
    Show() {
        this.animation = this.$element('content').animate(this.frames, this.options);
        this.animation.play();
    }
}

en-us_image_0000001222967796

NOTE

direction: mode of playing the animation.

normal: plays the animation in forward loop mode.

reverse: plays the animation in reverse loop mode.

alternate: plays the animation in alternating loop mode. When the animation is played for an odd number of times, the playback is in forward direction. When the animation is played for an even number of times, the playback is in reverse direction.

alternate-reverse: plays the animation in reverse alternating loop mode. When the animation is played for an odd number of times, the playback is in reverse direction. When the animation is played for an even number of times, the playback is in forward direction.