微信小程序图片左右摆动效果详解

<image class='img' src="http://intmote.com/picture/gift.png" animation="{{animation}}"></image>

.img {
 width: 120rpx;
 height: 120rpx;
 margin:300rpx;
}

Page({
 data: {
  animation: {},
 },
 onLoad: function () {
 },
 onShow: function () {
  // 1: 创建动画实例animation:
  var animation = wx.createAnimation({
   duration: 500,
   timingFunction: 'ease',
  })
  this.animation = animation
  var next = true;
  //连续动画关键步骤
  setInterval(function () {
   //2: 调用动画实例方法来描述动画
   if (next) {
    animation.translateX(4).step();
    animation.rotate(19).step()
    next = !next;
   } else {
    animation.translateX(-4).step();
    animation.rotate(-19).step()
    next = !next;
   }
   //3: 将动画export导出，把动画数据传递组件animation的属性 
   this.setData({
    animation: animation.export()
   })
  }.bind(this), 300)
 },
})