<a-form-item label="上传文件">
          <a-upload
            name="file"
            :file-list="fileList"
            :before-upload="beforeUpload"
            :customRequest="customRequest"
            v-decorator="['file', { rules: [{ required: true, message: '请上传文件' }] }]"
          >
            <a-button> <a-icon type="upload" /> 上传文件 </a-button>
          </a-upload>
        </a-form-item>pt

methods

// 设置表单回显数据
setInitalValue(file) {
      const { fileName, id, fileUrl } = file

      const param = {
        name: fileName,
        url: fileUrl,
        uid: id,
        status: 'done',
      }
      const blob = new Blob([fileUrl], { type: 'text/plain;charset=utf-8' })
      const textContain = this.transToFile(blob, fileName, 'text/plain')

      textContain.then((res) => {
        this.file = res //File 对象
        this.form.setFieldsValue({ file: res })
      })
      // form是写在modal中所以采用this.$nextTick()
      this.$nextTick(() => {
        this.fileList.push(param)
      })
    },
    async transToFile(blob, fileName, fileType) {
      return new window.File([blob], fileName, { type: fileType })
    },