AVAudioPlayer目标声音不播放 - 斯威夫特

Question

我已经为了创建了下面的对象类AVAudioPlayer的发挥噪音：

@IBAction func testSound() { 
    var sound:MusicAudio = MusicAudio() 
    sound.adjustAudioLayerState(true, layer: AudioLayerState.Bass) 

} 

：

class MusicAudio: NSObject, AVAudioPlayerDelegate { 

    var bassAudio : AVAudioPlayer! = AVAudioPlayer() 

    override init() { 
     super.init() 
     let bassAudioPath  = NSBundle.mainBundle().pathForResource("Raw", ofType:"mp3") 

     let fileURL = NSURL(fileURLWithPath: bassAudioPath!) 
     bassAudio = AVAudioPlayer(contentsOfURL: fileURL, error: nil) 
     bassAudio.currentTime = 0 
     bassAudio.volume = 1.0 
     bassAudio.delegate = self 
    } 

    func adjustAudioLayerState(volumeOn:Bool, layer:AudioLayerState) { 

     if layer == AudioLayerState.Bass { 
      self.bassAudio.prepareToPlay() 
      self.bassAudio.play() 
     } 
    } 
} 

要播放的噪音，我通过调用类

但是我没有收到任何音频播放，任何人都可以发现我的执行问题？

编辑：rdelmar答案

var bassAudio : AVAudioPlayer! = AVAudioPlayer() 

class MusicAudio: NSObject, AVAudioPlayerDelegate { 

    override init() { 
     super.init() 
     let bassAudioPath  = NSBundle.mainBundle().pathForResource("Raw", ofType:"mp3") 

     let fileURL = NSURL(fileURLWithPath: bassAudioPath!) 
     bassAudio = AVAudioPlayer(contentsOfURL: fileURL, error: nil) 
     bassAudio.currentTime = 0 
     bassAudio.volume = 1.0 
     bassAudio.delegate = self 
    } 

    func adjustAudioLayerState(volumeOn:Bool, layer:AudioLayerState) { 

     if layer == AudioLayerState.Bass { 
      self.bassAudio.prepareToPlay() 
      self.bassAudio.play() 
     } 
    } 
} 

Answer 1

后，因为你的MusicAudio类被释放你没有得到任何声音。你需要使var，sound，属性，而不是局部变量。

class ViewController: UIViewController { 

    var sound = MusicAudio() 

    @IBAction func testSound() { 
     self.sound.adjustAudioLayerState(true, layer: AudioLayerState.Bass) 
    } 

}