feat(Uploader): add upload-icon props (#2869)

packages/uploader/README.md

@@ -181,6 +181,7 @@ uploadFilePromise(fileName, chooseResult) {
 | camera             | 当 accept 为 `video` 时生效，可选值为 `back` `front`                                           | _string_             | -                           | -    |
 | compressed         | 当 accept 为 `video` 时生效，是否压缩视频，默认为`true`                                        | _boolean_            | -                           | -    |
 | max-duration       | 当 accept 为 `video` 时生效，拍摄视频最长拍摄时间，单位秒                                      | _number_             | -                           | -    |
+| upload-icon | 上传区域图标，可选值见 [Icon 组件](#/icon) | *string* | `plus` | - |
 
 ### Slot
 

packages/uploader/index.ts

@@ -71,6 +71,10 @@ VantComponent({
     maxDuration: {
       type: Number,
       value: 60
+    },
+    uploadIcon: {
+      type: String,
+      value: 'plus'
     }
   },
 

packages/uploader/index.wxml

@@ -49,7 +49,7 @@
         style="width: {{ utils.addUnit(previewSize) }}; height: {{ utils.addUnit(previewSize) }};"
         bind:tap="startUpload"
       >
-        <van-icon name="plus" class="van-uploader__upload-icon" />
+        <van-icon name="{{ uploadIcon }}" class="van-uploader__upload-icon" />
         <text wx:if="{{ uploadText }}" class="van-uploader__upload-text">{{ uploadText }}</text>
       </view>
     </block>