如何在UISlider中显示AVplayer当前的播放持续时间

Question

我正在使用自定义UISlider在AVPlayer中播放视频时实现擦洗。试图找出在UISlider各端显示当前播放时间和剩余持续时间的最佳方式，因为它通常显示在MPMoviePlayerController中。

感谢任何帮助。

Answer 1

在每一端都放一个UILabel。使用-[AVPlayer addPeriodicTimeObserverForInterval:queue:usingBlock:]更新它们。使用-[AVPlayer currentTime]和-[AVPlayerItem duration]计算剩余时间。

Answer 2

Swift 4.x

let player = AVPlayer()
player.addPeriodicTimeObserver(forInterval: CMTime.init(value: 1, timescale: 1), queue: .main, using: { time in
        if let duration = player.currentItem?.duration {
          let duration = CMTimeGetSeconds(duration), time = CMTimeGetSeconds(time)
          let progress = (time/duration)
          if progress > targetProgress {
              print(progress)
             //Update slider value
          }
        }
    })

或

extension AVPlayer {
    func addProgressObserver(action:@escaping ((Double) -> Void)) -> Any {
        return self.addPeriodicTimeObserver(forInterval: CMTime.init(value: 1, timescale: 1), queue: .main, using: { time in
            if let duration = self.currentItem?.duration {
                let duration = CMTimeGetSeconds(duration), time = CMTimeGetSeconds(time)
                let progress = (time/duration)
                action(progress)
            }
        })
    }
}

使用

let player = AVPlayer()
player.addProgressObserver { progress in
   //Update slider value
}

Answer 3

[slider setMaximumValue:[AVPlayerItem duration]];
//use NSTimer, run repeat function
-(void)updateValueSlide{
      [slider setValue:[AVPlayerItem duration]];
 }