IBAction为按钮：我想点击或单击一旦停止，然后单击或再次点击播放再次

Question

@IBAction func stopMusic(_ sender: AnyObject) { 
    if player != nil { 
     player.stop() 
    } 
    else{ 
     player.play() 
    } 
} 

Answer 1

var player: AVAudioPlayer? 
@IBAction func stopMusic(_ sender: AnyObject) { 
    if var p = player { 
     if p.playing { 
      p.stop() 
     } 
     else { 
      p = AVAudioPlayer() 
      p.prepareToPlay() 
      p.play() 
     } 
    } 
} 


override func viewDidLoad() { 
    player = AVAudioPlayer() 
}