更新：课程视频播放改成原生video组件

utils/videoStorage.ts

@@ -0,0 +1,118 @@
+// utils/videoStorage.ts
+
+interface VideoPosition {
+  id: number
+  time: number
+  updateTime: string
+  [key: string]: any
+}
+
+/**
+ * 视频播放位置本地存储服务
+ */
+class VideoStorageService {
+  private readonly STORAGE_KEY = 'videoOssList'
+  private readonly MAX_STORAGE_COUNT = 50
+
+  /**
+   * 获取视频播放位置
+   * @param videoId 视频ID
+   * @returns 播放位置（秒）或 null
+   */
+  getVideoPosition(videoId: number): number | null {
+    const list = this.getVideoList()
+    const video = list.find((v) => v.id === videoId)
+    return video?.time || null
+  }
+
+  /**
+   * 保存视频播放位置
+   * @param videoId 视频ID
+   * @param time 播放位置（秒）
+   * @param videoData 视频数据
+   */
+  saveVideoPosition(videoId: number, time: number, videoData: any): void {
+    const list = this.getVideoList()
+    const index = list.findIndex((v) => v.id === videoId)
+
+    const newItem = {
+      ...videoData,
+      id: videoId,
+      time,
+      updateTime: new Date().toISOString()
+    }
+
+    if (index >= 0) {
+      list[index] = newItem
+    } else {
+      list.push(newItem)
+    }
+
+    this.setVideoList(list)
+    
+    // 自动清理旧数据
+    this.cleanOldData()
+  }
+
+  /**
+   * 清理旧数据（保留最近 50 个）
+   */
+  cleanOldData(): void {
+    const list = this.getVideoList()
+    
+    if (list.length > this.MAX_STORAGE_COUNT) {
+      // 按更新时间排序，保留最新的
+      const sorted = list.sort((a, b) => {
+        const timeA = new Date(b.updateTime || 0).getTime()
+        const timeB = new Date(a.updateTime || 0).getTime()
+        return timeA - timeB
+      })
+      
+      this.setVideoList(sorted.slice(0, this.MAX_STORAGE_COUNT))
+    }
+  }
+
+  /**
+   * 清除指定视频的播放位置
+   * @param videoId 视频ID
+   */
+  clearVideoPosition(videoId: number): void {
+    const list = this.getVideoList()
+    const filtered = list.filter((v) => v.id !== videoId)
+    this.setVideoList(filtered)
+  }
+
+  /**
+   * 清除所有播放位置
+   */
+  clearAll(): void {
+    uni.removeStorageSync(this.STORAGE_KEY)
+  }
+
+  /**
+   * 获取视频列表
+   */
+  private getVideoList(): VideoPosition[] {
+    try {
+      const data = uni.getStorageSync(this.STORAGE_KEY)
+      return data ? JSON.parse(data) : []
+    } catch (error) {
+      console.error('Failed to get video list from storage:', error)
+      return []
+    }
+  }
+
+  /**
+   * 设置视频列表
+   */
+  private setVideoList(list: VideoPosition[]): void {
+    try {
+      uni.setStorageSync(this.STORAGE_KEY, JSON.stringify(list))
+    } catch (error) {
+      console.error('Failed to set video list to storage:', error)
+    }
+  }
+}
+
+// 导出单例
+export const videoStorage = new VideoStorageService()