Page({
  data:{
    arrowAnimation:{},
  },

onReady(){
    var animation = wx.createAnimation({
      delay: 0,
      timingFunction:"linear",
      duration:1500,
      success(res){
        console.log("dzp arrowAnimation",res);
      }
    })
 
    this.data.arrowAnimation=animation
    var animationInterNum=setInterval(function(){
      // this.arrowAnimation.opacity(0).step().opacity(1).step()
      console.log("dzp arrowAnimation setInterval",this.data.arrowAnimation);
      this.data.arrowAnimation.translateY(-30).step().translateY(0).step()；
      this.setData({
        arrowAnimation:animation.export(),
      })
    }.bind(this),1500)
  },
 
bug 描述：151VM211 WAService.js:2 TypeError: this.data.arrowAnimation.translateY is not a function