 class="upload-file"
                drag
                :action="getUploadUrl(style)"
                :show-file-list="true"
                :on-progress="uploadProgress"
                :on-success="uploadSuccess"
                :on-error="uploadError"
                :on-remove="uploadRemove"
                :multiple="false">
                <i class="el-icon-upload"></i>
                <div class="el-upload__text">将文件拖到此处，或 <em>点击上传</em></div>
              </el-upload>
   