Merge pull request 'dengjie : 解决上传图片/附件的组件placeholder问题' (#16) from DJ into master

Reviewed-on: http://git.hchyun.com/clay/workflow-engine-web/pulls/16

flowable-engine-web/src/views/common/form/ComponentsConfigExport.js

@@ -134,7 +134,8 @@ export const baseComponents = [
           enablePrint: true,
           maxSize: 5, //图片最大大小MB
           maxNumber: 10, //最大上传数量
-          enableZip: true //图片压缩后再上传
+          enableZip: true, //图片压缩后再上传
+          placeholder: '请选择图片',
         }
       },
       {
@@ -149,7 +150,8 @@ export const baseComponents = [
           onlyRead: false, //是否只读，false只能在线预览，true可以下载
           maxSize: 100, //文件最大大小MB
           maxNumber: 10, //最大上传数量
-          fileTypes: [] //限制文件上传类型
+          fileTypes: [], //限制文件上传类型,
+          placeholder: '请选择附件',
         }
       },
       {