Swift audioPlayerDidFinishPlaying метод не называется

Question

Я создал три UIButtons на MainStoryBoard.

Когда я нажимаю «yourButton3», плеер3 не вызывается.

Я обнаружил, что изменение else, если предложение или присвоение чего-либо игроку3 решит эту проблему, но не знает, как это сделать.

 override func viewDidLoad() { 
      super.viewDidLoad() 
      player1?.delegate = self 
      player2?.delegate = self 
      player3?.delegate = self 
     } 

     let url1 = Bundle.main.bundleURL.appendingPathComponent("music1.mp3") 
     let url2 = Bundle.main.bundleURL.appendingPathComponent("music2.mp3") 

     @IBOutlet weak var yourButton: customButton! 
     @IBOutlet weak var yourButton2: customButton! 
     @IBOutlet weak var yourButton3: customButton! 


     fileprivate var player1:AVAudioPlayer? 
     fileprivate var player2:AVAudioPlayer? 
     fileprivate var player3:AVAudioPlayer? 


     @IBAction func pushButton1(sender: UIButton) { 
      Player(url: url1) 
     } 

     @IBAction func pushButton2(sender: UIButton) { 
      Player1(url: url2) 
     } 

     @IBAction func pushButton3(_ sender: UIButton) { 
      Player(url: url2) 
      player1!.play() 

     } 

//player3 is not called in this code 

     func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) { 
      if (player === player1) { 
       yourButton.isSelected = false 
      } else if (player === player2) { 
       yourButton2.isSelected = false 
      } else if (player === player3) { 
       yourButton.isSelected = false 
       player2!.play() 
       yourButton2.isSelected = false 
      } 
     } 



     func Player(url: URL) { 
      do { 
       try player1 = AVAudioPlayer(contentsOf:url) 
       player1!.play() 
       yourButton.isSelected = true 
       player1!.delegate = self 
      } catch { 
       print(error) 
      } 
     } 

     func Player1(url: URL) { 
      do { 
       try player2 = AVAudioPlayer(contentsOf:url) 
       player2!.play() 
       yourButton2.isSelected = true 
       player2!.delegate = self 

      } catch { 
       print(error) 
      } 
     } 

     func Player3(url: URL, url2: URL) { 
      do { 
       try player1 = AVAudioPlayer(contentsOf:url) 
       try player2 = AVAudioPlayer(contentsOf: url2) 
       player1!.play() 
       yourButton.isSelected = true 
       player1!.delegate = self 
      } catch { 
       print(error) 
      } 
     } 

Answer 1

Вы не инициализации player3 в вашей Player(url:) функции, поэтому player === player3 никогда не будет правдой.

Вы можете редактировать свои Player3(url:, url2:) функции, как показано ниже:

func Player3(url: URL, url2: URL) { 
    do { 
     try player3 = AVAudioPlayer(contentsOf:url) 
     try player2 = AVAudioPlayer(contentsOf: url2) 
     player3!.play() 
     yourButton.isSelected = true 
     player3!.delegate = self 
     player2!.delegate = self 
    } catch { 
     print(error) 
    } 
} 

и назвать его так:

@IBAction func pushButton3(_ sender: UIButton) { 
    Player3(url: url1, url2: url2) 
}