Ios 下一步如何跟踪AVPlayer

我花了几天的时间试图制作一个包含下一首歌的按钮，但我做不到 这是我的问题 如何使用avPlayer在点击按钮时放置下一个掼掼掼掼ф掼掼

这是我的密码

class ViewControllerAudioDetail: UIViewController {


var avPlayer:AVQueuePlayer?
var status = false
fileprivate let seekDuration: Float64 = 10
fileprivate let seekDurationThirty: Float64 = 30

var mod = [Modal]()



@IBOutlet weak var ImageView: UIImageView!

@IBOutlet weak var startTime: UILabel!
@IBOutlet weak var endTime: UILabel!
@IBOutlet weak var sliderSong: UISlider!
@IBOutlet weak var name: UILabel!

@IBOutlet weak var Volume: UISlider!
@IBOutlet weak var iconChange: UIButton!


override func viewDidLoad() {
    super.viewDidLoad()

    Volume.setThumbImage(UIImage(named:"Play.png"), for: .normal)
    sliderSong.minimumValue = 0
    sliderSong.maximumValue = 1

    name.text = mod[thisSong].AudioName
    ImageView.image = mod[0].ImageViewAudio


    let url = URL(string: mod[thisSong].UrlName!)
    let playerItem = AVPlayerItem(url: url!)
    avPlayer = AVQueuePlayer(playerItem:playerItem)


    let _ = avPlayer!.addPeriodicTimeObserver(forInterval: CMTime(seconds: 1, preferredTimescale: CMTimeScale(NSEC_PER_SEC)), queue: DispatchQueue.main) { [weak self] (time) in

        let duration = CMTimeGetSeconds((self?.avPlayer!.currentItem!.asset.duration)!)
        self?.sliderSong.value = Float(CMTimeGetSeconds(time)) / Float(duration)

    }


    let duration = CMTimeGetSeconds(avPlayer!.currentItem!.asset.duration)
    let minutesTextOut = Int(duration) / 60 % 60
    let secondsTextOut = Int(duration) % 60
    let strDuration = String(format:"%02d:%02d", minutesTextOut, secondsTextOut)
    endTime.text = strDuration



}

@IBAction func sliderSong(_ sender: UISlider) {

        //перемотка аудиозвука
        let duration = CMTimeGetSeconds(avPlayer!.currentItem!.asset.duration)
        let value = sliderSong.value
        let durationToSeek = Float(duration) * value

        avPlayer?.seek(to: CMTimeMakeWithSeconds(Float64(durationToSeek),avPlayer!.currentItem!.duration.timescale)) { [](state) in

            if (self.iconChange.currentImage?.isEqual(UIImage(named: "Play.png")))! {
                self.avPlayer?.pause()
            } else if (self.iconChange.currentImage?.isEqual(UIImage(named: "Pause.png")))!{
                self.avPlayer?.play()
            }
        }
}


@IBAction func volume(_ sender: UISlider) {

    avPlayer?.volume = sender.value
}



@IBAction func minusThirtySec(_ sender: Any) {

    let playerCurrentTime = CMTimeGetSeconds((avPlayer?.currentTime())!)
    var newTime = playerCurrentTime - seekDurationThirty

    if newTime < 0 {
        newTime = 0
    }
    let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
    avPlayer?.seek(to: time2, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)


}
@IBAction func minusTenSec(_ sender: Any) {

    let playerCurrentTime = CMTimeGetSeconds((avPlayer?.currentTime())!)
    var newTime = playerCurrentTime - seekDuration

    if newTime < 0 {
        newTime = 0
    }
    let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
    avPlayer?.seek(to: time2, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)

}

@IBAction func plusTenSec(_ sender: Any) {

    guard let duration = avPlayer?.currentItem?.duration else{
        return
    }
    let playerCurrentTime = CMTimeGetSeconds((avPlayer?.currentTime())!)
    let newTime = playerCurrentTime + seekDuration

    if newTime < (CMTimeGetSeconds(duration) - seekDuration) {

        let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
        avPlayer?.seek(to: time2, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)

    }

}
@IBAction func plusThirtySec(_ sender: Any) {

    guard let duration = avPlayer?.currentItem?.duration else{
        return
    }
    let playerCurrentTime = CMTimeGetSeconds((avPlayer?.currentTime())!)
    let newTime = playerCurrentTime + seekDurationThirty

    if newTime < (CMTimeGetSeconds(duration) - seekDuration) {

        let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
        avPlayer?.seek(to: time2, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)

    }

}

@IBAction func Next(_ sender: Any) {

    let url = URL(string: mod[thisSong].UrlName!)
    let playerItem = AVPlayerItem(url: url!)
    avPlayer = AVQueuePlayer(playerItem:playerItem)

    avPlayer?.insert(playerItem, after: playerItem)
    avPlayer?.advanceToNextItem()


 //        if thisSong + 1 > mod.count {
 //            thisSong = 0
 //        } else {
 //            thisSong += 1
  //        }
  //      
  //        
  //        if thisSong != mod.count{
  //            
 //            name.text = mod[thisSong].AudioName
 //            player(urlSong:mod[thisSong].UrlName!)
 //            avPlayer?.play()
 //
 //            
 //            
 //        }

}
@IBAction func Back(_ sender: Any) {



 //        if thisSong != 0{
 //            thisSong -= 1
 //            name.text = mod[thisSong].AudioName
 //            player(urlSong:mod[thisSong].UrlName!)
 //            avPlayer?.play()
 //
 //            
 //        }

}




@IBAction func Play(_ sender: Any) {


    if avPlayer?.rate == 0 {
        avPlayer?.play()
        avPlayer?.rate = 1.0
        iconChange.setImage(UIImage(named:"Pause.png"), for: .normal)


        avPlayer?.addPeriodicTimeObserver(forInterval: CMTimeMakeWithSeconds(1, 1), queue: nil, using: {
            (CMTime) -> Void in

            self.updateProgressBar()
        })



    } else {
        avPlayer?.rate = 0.0
        avPlayer?.pause()
        iconChange.setImage(UIImage(named:"Play.png"), for: .normal)

    }

}


func player(urlSong:String) {




}



func updateProgressBar(){
    let timeNow = Int(avPlayer!.currentTime().value) / Int(avPlayer!.currentTime().timescale)

    let minutesText = timeNow / 60
    let secondsText = timeNow % 60

    let duration = String(format:"%02d:%02d", minutesText, secondsText)
    startTime.text = duration

}

---

使用AVQueuePlayer代替AVPlayer可以让您直接添加项目

AVQueuePlayer.insert(item: AVPlayerItem, after: AVPlayerItem?)
AVQueuePlayer.advanceToNextItem()

您还可以使用AVPlayerItems数组初始化播放器

AVQueuePlayer = AVQueuePlayer(items: [AVPlayerItem])

---

使用AVQueuePlayer代替AVPlayer可以让您直接添加项目

AVQueuePlayer.insert(item: AVPlayerItem, after: AVPlayerItem?)
AVQueuePlayer.advanceToNextItem()

您还可以使用AVPlayerItems数组初始化播放器

AVQueuePlayer = AVQueuePlayer(items: [AVPlayerItem])

在它的tableview中，我添加了func didSelectRowAt，在其中我编写了一个全局计数器来接收单元格编号

 override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    thisSong = indexPath.row

}

并通过prepareForSegue将数据传递给控制器

在我的详细控制器中，我为前一首歌和下一首歌创建了两个按钮

var avPlayer:AVPlayer?

var mod = [Modal]()


@IBAction func Next(_ sender: Any) {


    if thisSong == mod.count - 1 {
        thisSong = 0
    } else {
        thisSong += 1
    }


    if thisSong != mod.count{
        avPlayer?.removeTimeObserver(sliderDuration)

        name.text = mod[thisSong].AudioName
        player(urlSong:mod[thisSong].UrlName!)

        Status()

    }

}

@IBAction func Back(_ sender: Any) {


    if thisSong != 0 {
        thisSong -= 1
    } else {
        thisSong = mod.endIndex
    }


        avPlayer?.removeTimeObserver(sliderDuration)
        name.text = mod[thisSong].AudioName
        player(urlSong:mod[thisSong].UrlName!)

       Status()




}

该函数确定播放器的状态并设置相同的数据

func Status(){
    if status == true {
        iconChange.setImage(UIImage(named:"Pause.png"), for: .normal)
        avPlayer?.play()
    } else {
        iconChange.setImage(UIImage(named:"Play.png"), for: .normal)
        avPlayer?.pause()
    }

}

这里我创建了一个播放器

func player(urlSong:String) {

    let url = URL(string: urlSong)
    let playerItem = AVPlayerItem(url: url!)
    avPlayer = AVPlayer(playerItem:playerItem)


     sliderDuration = avPlayer!.addPeriodicTimeObserver(forInterval: CMTime(seconds: 1, preferredTimescale: CMTimeScale(NSEC_PER_SEC)), queue: DispatchQueue.main) { [weak self] (time) in

        let duration = CMTimeGetSeconds((self?.avPlayer!.currentItem!.asset.duration)!)
        self?.sliderSong.value = Float(CMTimeGetSeconds(time)) / Float(duration)

    }


    let duration = CMTimeGetSeconds(avPlayer!.currentItem!.asset.duration)
    let minutesTextOut = Int(duration) / 60 % 60
    let secondsTextOut = Int(duration) % 60
    let strDuration = String(format:"%02d:%02d", minutesTextOut, secondsTextOut)
    endTime.text = strDuration


}

在它的tableview中，我添加了func didSelectRowAt，在其中我编写了一个全局计数器来接收单元格编号

 override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    thisSong = indexPath.row

}

并通过prepareForSegue将数据传递给控制器

在我的详细控制器中，我为前一首歌和下一首歌创建了两个按钮

var avPlayer:AVPlayer?

var mod = [Modal]()


@IBAction func Next(_ sender: Any) {


    if thisSong == mod.count - 1 {
        thisSong = 0
    } else {
        thisSong += 1
    }


    if thisSong != mod.count{
        avPlayer?.removeTimeObserver(sliderDuration)

        name.text = mod[thisSong].AudioName
        player(urlSong:mod[thisSong].UrlName!)

        Status()

    }

}

@IBAction func Back(_ sender: Any) {


    if thisSong != 0 {
        thisSong -= 1
    } else {
        thisSong = mod.endIndex
    }


        avPlayer?.removeTimeObserver(sliderDuration)
        name.text = mod[thisSong].AudioName
        player(urlSong:mod[thisSong].UrlName!)

       Status()




}

该函数确定播放器的状态并设置相同的数据

func Status(){
    if status == true {
        iconChange.setImage(UIImage(named:"Pause.png"), for: .normal)
        avPlayer?.play()
    } else {
        iconChange.setImage(UIImage(named:"Play.png"), for: .normal)
        avPlayer?.pause()
    }

}

这里我创建了一个播放器

func player(urlSong:String) {

    let url = URL(string: urlSong)
    let playerItem = AVPlayerItem(url: url!)
    avPlayer = AVPlayer(playerItem:playerItem)


     sliderDuration = avPlayer!.addPeriodicTimeObserver(forInterval: CMTime(seconds: 1, preferredTimescale: CMTimeScale(NSEC_PER_SEC)), queue: DispatchQueue.main) { [weak self] (time) in

        let duration = CMTimeGetSeconds((self?.avPlayer!.currentItem!.asset.duration)!)
        self?.sliderSong.value = Float(CMTimeGetSeconds(time)) / Float(duration)

    }


    let duration = CMTimeGetSeconds(avPlayer!.currentItem!.asset.duration)
    let minutesTextOut = Int(duration) / 60 % 60
    let secondsTextOut = Int(duration) % 60
    let strDuration = String(format:"%02d:%02d", minutesTextOut, secondsTextOut)
    endTime.text = strDuration


}

播放选定/当前歌曲

要播放Previous歌曲

播放下一首歌

播放选定/当前歌曲

要播放Previous歌曲

播放下一首歌

---

我已经添加了我的答案，请在您的代码中添加方法，它肯定会工作。如果你需要的话，我有一个完整的例子。@Ashoklondh我已经解决了这个问题，但是你的方法也很有效。你是对的。这两种方法都有效，但我想建议大家使用我的答案，因为这是经过优化的代码。而且它很容易理解。如果有任何这样的问题在AVPlayer让我知道我一定会帮助你。谢谢。@Ashoklondh你能帮我解决这个问题吗？当然，我想帮助你。我已经添加了我的答案，请在你的代码中添加方法，它肯定会工作。如果你需要的话，我有一个完整的例子。@Ashoklondh我已经解决了这个问题，但是你的方法也很有效。你是对的。这两种方法都有效，但我想建议大家使用我的答案，因为这是经过优化的代码。而且它很容易理解。如果有任何这样的问题在AVPlayer让我知道我一定会帮助你。谢谢。@Ashoklondh你能帮我解决这个问题吗？我当然愿意帮助你。