如何在客户类别中播放声音并识别声音播放结束

Question

我想在单独的类（而不是viewController类）中的swift应用程序中播放mp3文件，并识别声音的结尾。我的代码在AppDelegate.swift中发送了EXC_BAD_ACCESS。

这里是我的代码：

UIViewController.swift

class ViewController: UIViewController, AVAudioPlayerDelegate {


    override func viewDidLoad() {
        super.viewDidLoad()


        let soundM = soundManager()
        soundM.loadFile("glass_ping", soundType: "mp3")
        soundM.playNow()

soundManager.swift

import Foundation
import AVFoundation

var audioPlayer = AVAudioPlayer();

class soundManager: NSObject, AVAudioPlayerDelegate {

    override init()
    {
        super.init();
        print("hallo")
    }

    func playNow(){
        audioPlayer.play()
    }

    func loadFile(_ soundName: String, soundType: String){
        let sound = Bundle.main.path(forResource: soundName, ofType: soundType)

        do{
            audioPlayer = try AVAudioPlayer(contentsOf: URL(fileURLWithPath: sound!))
            audioPlayer.delegate = self
            audioPlayer.prepareToPlay()
            audioPlayer.rate = 2.0
            //audioPlayer.numberOfLoops = 2
        }catch{
            print(error)
        }
    }

    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
        print("finish")
    }

任何想法？

谢谢

Answer 1

我发现了一个非常奇怪的解决方案，我不确定它为什么起作用：

UIViewController.swift

import UIKit
import AVFoundation

class ViewController: UIViewController {

    private var player: AudioPlayerComposition!
    @IBOutlet weak var power: Visualizer!

    override func viewDidLoad() {
        super.viewDidLoad()


        // Get URL to resouce, create audioPlayer

        let audioPlayer = AVAudioPlayer();
        player = AudioPlayer(player: audioPlayer)
        //player.play()

AudioPlayer.swift

import Foundation
import AVFoundation

class AudioPlayer: NSObject, AVAudioPlayerDelegate {

    private var player: AVAudioPlayer

    init(player: AVAudioPlayer, view: Visualizer) {
        self.player = player                
        super.init()
        self.loadFile("test", soundType: "mp3")
    }

    func loadFile(_ soundName: String, soundType: String){
        let sound = Bundle.main.path(forResource: soundName, ofType: soundType)
        do {
            self.player = try AVAudioPlayer(contentsOf: URL(fileURLWithPath: sound!))
            self.player.prepareToPlay()
            self.player.play()
        }catch{
            print(error)
        }
    }

    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
        print ("Finish")
    }

这确实有效。但是，何况没有线索？