//获取多张图片
  chooseImage: function () {
    var that = this;
    var res_url = app.globalData.res_url;
    wx.chooseImage({
      count: 4, // 最多可以选择的图片张数，默认9
      sizeType: ['original', 'compressed'], // original 原图，compressed 压缩图，默认二者都有
      sourceType: ['album', 'camera'], // album 从相册选图，camera 使用相机，默认二者都有
      count: this.data.count[this.data.countIndex],
      success: function (res) {
        var tempFilePaths = res.tempFilePaths;
        // console.log(tempFilePaths)
        //console.log(res)
        // console.log('xxxxxx')
        that.setData({
          imageList: res.tempFilePaths,
        })
        wx.uploadFile({
          url: res_url + 'index.php?g=admin&m=wxxcx&a=release',
          method: "POST",
          header: {
            "Content-Type": "application/x-www-form-urlencoded",
          },
          filePath: tempFilePaths[0],
          name: 'file',
          formData: {
            'user': 'test'
          },
          success: function (res) {
            var data = tempFilePaths[0]
            // console.log(data)
            that.setData({
              data: tempFilePaths[0],
            })
            //do something
          }
        }),
       
      }
    })
  },

这是我的代码？？不知道怎么在后台获取图片？？求解