Ios 敏捷的AVPlayer。如何跟踪歌曲何时结束播放？

当song在Swift中使用AVPlayer完成播放时，东方的追踪方式是什么

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是否有任何函数在avplayer完成播放时被调用，或者我应该将计时器与avplayer类引用相结合？

类似的功能：

func play(url: NSURL) {
    let item = AVPlayerItem(URL: url)

    NSNotificationCenter.defaultCenter().addObserver(self, selector: "playerDidFinishPlaying:", name: AVPlayerItemDidPlayToEndTimeNotification, object: item)

    let player = AVPlayer(playerItem: item)
    player.play()
}

func playerDidFinishPlaying(note: NSNotification) {
    // Your code here
}

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完成后（或在

deinit

中），不要忘记移除观察者

您需要创建一个实现该协议的对象，并将其用作

AVAudioPlayer

对象的委托。然后将它们链接在一起，例如：

audioPlayer = try! AVAudioPlayer(contentsOf: audioFileUrl)
audioPlayer.delegate = self

委托可以实现响应特定事件的方法。当音频播放结束时，此按钮将触发：

func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
    // ...
}

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对于Swif3，您需要进行如下更改：

func play(url: NSURL) {
let item = AVPlayerItem(URL: url)
  NotificationCenter.default.addObserver(self,selector:Selector("playerDidFinishPlaying"), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: item)

let player = AVPlayer(playerItem: item)
player.play() 
}

func playerDidFinishPlaying() {
// Your code here
} 

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Swift 3的另一个版本

NotificationCenter.default.addObserver(self, selector: #selector(self.playerDidFinishPlaying(sender:)), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: item)

func playerDidFinishPlaying(sender: Notification) {

    // Do Something
}

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更完整的解决方案如下：

import UIKit
import AVFoundation
import MediaPlayer


class ViewController: UIViewController,AVAudioPlayerDelegate {

    var player: AVAudioPlayer = AVAudioPlayer()

    @IBAction func play(_ sender: UIButton) {
        player.play()
        player.currentTime=14*60-10
        print(player.currentTime)
    }
    @IBAction func pause(_ sender: UIButton) {
        player.pause()
    }
    @IBAction func replay(_ sender: UIButton) {
        player.currentTime=0
    }


    override func viewDidLoad() {
        super.viewDidLoad()
        do{
            let audioPath = Bundle.main.path(forResource: "elon", ofType: "mp3")
            player = try AVAudioPlayer(contentsOf: URL.init(fileURLWithPath: audioPath!))
            player.prepareToPlay()
            player.delegate = self
        }
        catch{
            print(error)
        }
    }

    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool){
        print(flag)
        print("here")
        if flag == true{

        }
    }


}

对于Swift 4.2

func play(url: URL) {
    let item = AVPlayerItem(url: url)
    NotificationCenter.default.addObserver(self, selector: #selector(self.playerDidFinishPlaying(sender:)), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: item)

    let player = AVPlayer(playerItem: item)
    player.play() 
}

@objc func playerDidFinishPlaying(sender: Notification) {
    // Your code here
}

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当我测试它时，我得到了这个错误：“由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：'-[myApp.MyViewController PlayerDifinishPlaying]：未识别的选择器发送到实例”。你能帮帮我吗？@Llg忘了：在“PlayerDifinishPlay”中：@Flimm他使用的是AVPlayer而不是AVAudioPlayerdon别忘了添加类ViewController:AVaudioPlayerLegate{回答得好！我使用的是AVAudioPlayer，代理工作得很好Mike Carpenter，我尝试了你的解决方案，但没有成功。请看下一步我的代码的“答案”。你收到了什么错误？我在一些项目中有这段代码，它编译和执行时没有任何问题。不要混淆AVPlayer和AVAudioPlayer-下面的一些答案是针对AVAudioPlayer的。

func play(url: URL) {
    let item = AVPlayerItem(url: url)
    NotificationCenter.default.addObserver(self, selector: #selector(self.playerDidFinishPlaying(sender:)), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: item)

    let player = AVPlayer(playerItem: item)
    player.play() 
}

@objc func playerDidFinishPlaying(sender: Notification) {
    // Your code here
}