AVAudioPlayer 在调试模式下抛出断点

swift
import AVFoundation
class ViewController: UIViewController, AVAudioPlayerDelegate {
    
    var audioPlayer: AVAudioPlayer?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let audioFileURL = Bundle.main.url(forResource: "audio", withExtension: "mp3")
        
        do {
            audioPlayer = try AVAudioPlayer(contentsOf: audioFileURL!)
            audioPlayer?.delegate = self
            audioPlayer?.prepareToPlay()
        } catch let error {
            print("Failed to create audio player: \(error.localizedDescription)")
        }
    }
    
    @IBAction func playButtonTapped(_ sender: UIButton) {
        if let player = audioPlayer {
            if player.isPlaying {
                player.pause()
            } else {
                player.play()
            }
        }
    }
    
    // AVAudioPlayerDelegate methods
    
    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
        if flag {
            print("Audio player finished playing")
        } else {
            print("Audio player failed to finish playing")
        }
    }
    
    func audioPlayerDecodeErrorDidOccur(_ player: AVAudioPlayer, error: Error?) {
        if let error = error {
            print("Audio player decode error: \(error.localizedDescription)")
        }
    }
}