data:{
    animation:''"
    }

 onShow: function() {
    console.log('index---------onShow()')
     this.animation = wx.createAnimation({
     duration: 1400,
     timingFunction: 'linear', // "linear","ease","ease-in","ease-in-out","ease-out","step-start","step-end"
     delay: 0,
     transformOrigin: '50% 50% 0',
     success: function(res) {
      console.log("res")
     }
    })
   },
   rotateAni: function (n) {
    console.log("rotate=="+n)
    this.animation.rotate(180*(n)).step()
    this.setData({
     animation: this.animation.export()
    })
   },

 <view class="show-iconView">
   <image src="{{src}}" class="show-iconImage" animation="{{animation}}" mode="scaleToFill"></image>
 </view>