HarmonyOS 自定义视频控制器？

Question

Slider({
  value: this.currentTime,
  min: 0,
  max: this.duration,
  onChange: (value: number, mode: SliderChangeMode) => {
    this.currentTime = value;
    this.controller.setCurrentTime(value, SeekMode.Accurate);
  }
})

在自定义视频控制中，这个方法为何是报错的？

onChange: (value: number, mode: SliderChangeMode) => {
  this.currentTime = value;
  this.controller.setCurrentTime(value, SeekMode.Accurate);
}

Answer 1

参考demo

/*
基于video组件，实现视频播放功能,主要用于控制视频的状态，具体功能包括
* 播放、暂停、停止、跳转、设置进度等
*
 */
@Entry
@Component
struct VideoCreateComponent {
  @State duration: number =0 //当前视频的时长，单位为秒。
  @State currentTime: number =0//当前视频播放的进度，单位为秒。
  // 调用接口来创建video组件加载本地视频，src指定视频播放源的路径，设置视频封面
  @State videoSrc: Resource = $rawfile('video1.mp4')
  @State previewUri: Resource = $r('app.media.startIcon')
  @State curRate: PlaybackSpeed = PlaybackSpeed.Speed_Forward_1_00_X //是设置倍速播放
  @State isAutoPlay: boolean = false
  @State showControls: boolean = true
  // controller接口设置视频控制器，用于自定义控制视频，开始，暂停，结束，精准跳转
  controller: VideoController = new VideoController()
  build() {
    Column() {
      //添加属性和事件调用，主要为播放开始、暂停结束、播放失败、视频准备和操作进度条等事件
      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')
        })
        .onFinish(() => {
          console.info('onFinish')
        })
        .onError(() => {
          console.info('onError')
        })
        .onPrepared((e) => {
          this.duration = e.duration;
          console.info('onPrepared is ' + e.duration)
        })
        .onSeeking((e) => {
          console.info('onSeeking is ' + e.time)
        })
        .onSeeked((e) => {
          console.info('onSeeked is ' + e.time)
        })
        .onUpdate((e) => {
          this.currentTime = e.time;
          console.info('onUpdate is ' + e.time)
        })

      Row() {
        Button('start').onClick(() => {
          this.controller.start() // 开始播放
        }).margin(5)
        Button('pause').onClick(() => {
          this.controller.pause() // 暂停播放
        }).margin(5)
        Button('stop').onClick(() => {
          this.controller.stop() // 结束播放
        }).margin(5)
        Button('setTime').onClick(() => {
          this.controller.setCurrentTime(10, SeekMode.Accurate) // 精准跳转到视频的10s位置
        }).margin(5)
      }
      Row() {
        Button('rate 0.75').onClick(() => {
          this.curRate = PlaybackSpeed.Speed_Forward_0_75_X // 0.75倍速播放
        }).margin(5)
        Button('rate 1').onClick(() => {
          this.curRate = PlaybackSpeed.Speed_Forward_1_00_X // 原倍速播放
        }).margin(5)
        Button('rate 2').onClick(() => {
          this.curRate = PlaybackSpeed.Speed_Forward_2_00_X // 2倍速播放
        }).margin(5)
      }
      Slider({
        value: this.currentTime,
        min: 0,
        max: this.duration,
      })
        .onChange((value: number, mode: SliderChangeMode) => {
          this.controller.start() // 开始播放
          this.currentTime = value;
          this.controller.setCurrentTime(value, SeekMode.Accurate);
        })
    }
  }}