getusername: function(){
    var that = this 
    wx.getUserInfo({
      success: function(res) {
        console.log('success',res)
        that.setData({
          name:res.userInfo.nickName,
          path:res.userInfo.avatarUrl
        });


      },
      fail:function(res){
        console.log('fail')
      }
    })
  },