小白求大佬提携！！！

覆盖云图片，fileID路径不变，当是前端不会重新加载和显示，       cloudPath: ‘user_head/’+getApp().globalData.id+’_head.png’, 把云图片覆盖，且用时间戳 做路径，会重新加载，但是原图还在，浪费空间

       cloudPath: ‘user_head/’+Date.parse(new Date()) +’_head.png’,如何解决，求教！！！

set_head() {

    var that = this;

    wx.chooseImage({

      count: 1,

      sizeType: [‘original’, ‘compressed’], // 可以指定是原图还是压缩图，默认二者都有

      sourceType: [‘album’, ‘camera’], // 可以指定来源是相册还是相机，默认二者都有

      success: function (res) {

        wx.cloud.uploadFile({

          cloudPath: ‘user_head/’+getApp().globalData.id+’_head.png’,

          filePath: res.tempFilePaths[0],

          success(res) {

            console.log(res.fileID)////////

            that.setData({

              head: res.fileID

            })

           console.log(that.data.head)////////

            admin.doc(getApp().globalData.id).update({

              data: {

                head:res.fileID

              },

              success: function (res) {

                console.log(‘成功’+that.data.head)/////////

              },

              fail: function (res) {

                console.log(‘失败’+that.data.head)//////////

              }

            })

          }

        })

      }

    })

  },