feat(Upload): add index parameters to click event (#3942)

Author: anlyyao

packages/components/upload/README.en-US.md

@@ -33,7 +33,7 @@ transition | Object | { backTransition: true, duration: 300, timingFunction: 'ea
 name | params | description
 -- | -- | --
 add | `(files: MediaContext)` | [see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/upload/type.ts)。<br/>`type MediaContext = VideoContext[] \| ImageContext[]`<br/><br/>`interface VideoContext { name?: string; type?: string; url?: string; duration?: number; size?: number; width?: number; height?: number; thumb: string; progress: number }`<br/><br/>`interface ImageContext { name: string; type: string; url: string;  size: number; width: number; height: number; progress: number  }`<br/>
-click | `(file: VideoContext \| ImageContext)` | \-
+click | `(index: number; file: VideoContext \| ImageContext)` | \-
 complete | \- | \-
 drop | `(files: MediaContext) ` | [see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/upload/type.ts)。<br/>`type MediaContext = VideoContext[] \| ImageContext[]; interface VideoContext { name?: string; type?: string; url?: string; duration?: number; size?: number; width?: number; height?: number; thumb: string; progress: number }; interface ImageContext { name: string; type: string; url: string;  size: number; width: number; height: number; progress: number}`<br/>
 fail | \- | \-

packages/components/upload/README.md

@@ -96,7 +96,7 @@ transition | Object | { backTransition: true, duration: 300, timingFunction: 'ea
 名称 | 参数 | 描述
 -- | -- | --
 add | `(files: MediaContext)` | 选择后触发，仅包含本次选择的照片；`url` 表示选定视频的临时文件路径 (本地路径)。`duration` 表示选定视频的时间长度。`size`选定视频的数据量大小。更多描述参考 wx.chooseMedia 小程序官网描述。[详细类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/upload/type.ts)。<br/>`type MediaContext = VideoContext[] \| ImageContext[]`<br/><br/>`interface VideoContext { name?: string; type?: string; url?: string; duration?: number; size?: number; width?: number; height?: number; thumb: string; progress: number }`<br/><br/>`interface ImageContext { name: string; type: string; url: string;  size: number; width: number; height: number; progress: number  }`<br/>
-click | `(file: VideoContext \| ImageContext)` | 点击已选文件时触发；常用于重新上传
+click | `(index: number; file: VideoContext \| ImageContext)` | 点击已选文件时触发；常用于重新上传
 complete | \- | 上传成功或失败后触发
 drop | `(files: MediaContext) ` | 拖拽结束后触发，包含所有上传的文件（拖拽后的文件顺序）；`url` 表示选定视频的临时文件路径 (本地路径)。`duration` 表示选定视频的时间长度。`size` 选定视频的数据量大小。更多描述参考 wx.chooseMedia 小程序官网描述。[详细类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/packages/components/upload/type.ts)。<br/>`type MediaContext = VideoContext[] \| ImageContext[]; interface VideoContext { name?: string; type?: string; url?: string; duration?: number; size?: number; width?: number; height?: number; thumb: string; progress: number }; interface ImageContext { name: string; type: string; url: string;  size: number; width: number; height: number; progress: number}`<br/>
 fail | \- | 上传失败后触发

packages/components/upload/upload.ts

@@ -77,8 +77,8 @@ export default class Upload extends SuperComponent {
   }
 
   onFileClick(e: WechatMiniprogram.BaseEvent) {
-    const { file } = e.currentTarget.dataset;
-    this.triggerEvent('click', { file });
+    const { file, index } = e.currentTarget.dataset;
+    this.triggerEvent('click', { index, file });
   }
 
   /**