<button class='cut-btn' open-type='share' animation="{{animationData}}">喊好友砍一刀</button>

Page({

  /**
   * 页面的初始数据
   */
  data: {
    animationData: {}
  },
  
  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {
    var animation = wx.createAnimation({
      duration: 500,
      timingFunction: 'ease',
    })
    this.animation = animation
    var next = true;
    //连续动画关键步骤
    setInterval(function () {
      if (next) {
        this.animation.scale(0.95).step()   
        next = !next;
      } else {
        this.animation.scale(1).step()
        next = !next;
      }
      this.setData({
        animationData: animation.export()
      })
    }.bind(this), 500)
  },

  

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {
  
  }
})