handleBeforeUpload(file) {
      let _this = this
      return new Promise((resolve, reject) => {
        const check = _this.uploadList.length < _this.mutileUploadData.maxNum
        if (!check) {
          this.$Notice.warning({
            title: ‘最多上传‘ + this.mutileUploadData.maxNum + ‘张‘
          })
          reject(false)//重点
        }
        debugger
        let image = new Image()
        image.src = URL.createObjectURL(file)
        image.onload = () => {
          let width = _this.mutileUploadData.maxWidth
          let height = _this.mutileUploadData.maxHeight
          if (
            (width && image.width > width) ||
            (height && image.height > height)
          ) {
            this.$Modal.warning({
              title: ‘图片尺寸‘,
              content:
                ‘图片尺寸 ‘ +
                file.name +
                ‘ 太大，不能超过‘ +
                this.mutileUploadData.maxWidth +
                ‘*‘ +
                this.mutileUploadData.maxHeight +
                ‘。‘,
              onOk() {}
            })
            reject(false)//重点
          }
          resolve(true)//重点
        }
        image.onerror = () => {
          reject()
        }
      })
    }