持续时间不带Avplayer CurrentItem

Question

你好，我正在使用 AVPlayer进行视频流。这是我要播放的。

avPlayer = AVPlayer(url: videoURL! as URL)
playerLayer = AVPlayerLayer(player: avPlayer)
playerLayer.videoGravity=AVLayerVideoGravityResizeAspectFill
avPlayer.play()

现在，我想在视频播放时添加一个UISlider以移动。所以我这样做了。

let minimumValue:Float=0.00
sliderBar.minimumValue=minimumValue
playerLayer.frame = self.viewPlayer.bounds
self.viewPlayer.layer.addSublayer(playerLayer)
let duration : CMTime = avPlayer.avPlayer.currentItem!.asset.duration
let seconds : Float64 = CMTimeGetSeconds(duration)
sliderBar.maximumValue=Float(seconds)

但是当我打印duration时，这是我的输出

(lldb) po duration
▿ CMTime
 - value : 0
 - timescale : 0
▿ flags : CMTimeFlags
  - rawValue : 17
 - epoch : 0

如何获得此流视频的持续时间。请帮我。谢谢

Answer 1

 if let duration = avPlayer?.currentItem?.duration {
            let seconds = CMTimeGetSeconds(duration)
                if seconds.isFinite{
                    let second = Int(seconds)
                    let secondsText = second % 60
                    var secondString = "00"
                    if secondsText < 10{
                        secondString = "0(secondsText)"
                    }
                    else{
                        secondString = "(secondsText)"
                    }
                    let minutesText = String(format: "%02d", Int(seconds) / 60)
                    let videoLength =  "(minutesText):(secondString)"
                    print(videoLength)
                }
            }

它对我有用。欢呼。