在HarmonyOS NEXT开发中VideoController无法继承？

Question

在HarmonyOS NEXT开发中VideoController无法继承？继承VideoController后，再调用VideoController中的方法不再生效；现象就是点击暂停，暂停不下来，debug和日志可以看到方法已经被调用

Answer 1

解决方案如下：

// xxx.ets 
@Entry 
@Component 
struct VideoCreateComponent { 
  @State videoSrc: Resource = $rawfile('video1.mp4') 
  @State previewUri: Resource = $r('app.media.APEX') 
  @State curRate: PlaybackSpeed = PlaybackSpeed.Speed_Forward_1_00_X 
  @State isAutoPlay: boolean = false 
  @State showControls: boolean = true 
  controller: myVideoCol = new myVideoCol(); 
 
  build() { 
    Column() { 
      Video({ 
        src: this.videoSrc, 
        previewUri: this.previewUri, 
        currentProgressRate: this.curRate, 
        controller: this.controller 
      }) 
        .width('100%') 
        .height(600) 
        .autoPlay(this.isAutoPlay) 
        .controls(this.showControls) 
        .onStart(() => { 
          console.info('onStart') 
        }) 
        .onPause(() => { 
          console.info('onPause') 
        }) 
        .onUpdate((e?: TimeObject) => { 
          if (e != undefined) { 
            console.info('onUpdate is ' + e.time) 
          } 
        }) 
 
      Row() { 
        Button('start').onClick(() => { 
          this.controller.myStart() // 开始播放 
        }).margin(5) 
        Button('pause').onClick(() => { 
          this.controller.pause() // 暂停播放 
        }).margin(5) 
        Button('stop').onClick(() => { 
          this.controller.myStop() // 结束播放 
        }).margin(5) 
        Button('setTime').onClick(() => { 
          this.controller.mySeekTo(10) // 精准跳转到视频的10s位置 
          // this.controller.setCurrentTime(10, SeekMode.Accurate) // 精准跳转到视频的10s位置 
        }).margin(5) 
      } 
 
    } 
  } 
} 
 
interface DurationObject { 
  duration: number; 
} 
 
interface TimeObject { 
  time: number; 
} 
 
class myVideoCol extends VideoController { 
  myStart(): void { 
    console.log("myVideoCol === myStart") 
    super.start() 
  } 
 
  pause(): void { 
    console.log("myVideoCol === myPause") 
    super.pause() 
  } 
 
  myStop(): void { 
    console.log("myVideoCol === myStop") 
    super.stop() 
  } 
 
  mySeekTo(time: number): void { 
    console.log("myVideoCol === mySeekTo") 
    super.setCurrentTime(time) 
  } 
}