chooseImage: function (e) {
    var _this = this;
    //发起uploadfile
    wx.chooseImage({
      count: 1, //最多上传1张
      success: function (retFile) {
        console.log(retFile)
        var tempFilesSize = retFile.tempFiles[0].size;  //获取图片的大小，单位B
        if (tempFilesSize < 1048576) {
          var tempFilesPath = retFile.tempFilePaths[0];  //获取图片临时路径
          //判断是否是jpg、png格式
          app.wxRequest('?m=weixin&c=index&a=uploadSuffix', { path: tempFilesPath }).then(
            res => {
              //请求成功 保存临时路径
              if (res.code == 1) {
                _this.setData({ up_img: tempFilesPath, preview: true });
              } else {
                app.showAlert(res.msg)
              }
            }
          )
        } else {
          app.showAlert('上传图片不能大于1MB！');
        }
      }
    })
  },