AVAudioPlayer对象声音不玩 - 斯威夫特 [英] AVAudioPlayer Object Sound Not Playing - Swift

问题描述

我已经为了起到隔音创建的对象类AVAudioPlayer的如下：

 类MusicAudio：NSObject的，AVAudioPlayerDelegate {    VAR bassAudio：AVAudioPlayer！ = AVAudioPlayer（）    重载的init（）{
        super.init（）
        让bassAudioPath = NSBundle.mainBundle（）pathForResource（原始，ofType：MP3）。        让fileURL = NSURL（fileURLWithPath：bassAudioPath）
        bassAudio = AVAudioPlayer（contentsOfURL：fileURL，错误：无）
        bassAudio.currentTime = 0
        bassAudio.volume = 1.0
        bassAudio.delegate =自
    }    FUNC adjustAudioLayerState（volumeOn：BOOL，层：AudioLayerState）{        如果层== {AudioLayerState.Bass
            self.bassAudio。prepareToPlay（）
            self.bassAudio.play（）
        }
    }
}
 

要播放的声音，我通过调用类的：

  @IBAction FUNC testSound（）{
    VAR的声音：MusicAudio = MusicAudio（）
    sound.adjustAudioLayerState（真，层：AudioLayerState.Bass）}
 

不过我没有得到任何音频播放，任何人都可以当场与我的执行有问题？

编辑：rdelmar答案后

  VAR bassAudio：AVAudioPlayer！ = AVAudioPlayer（）类MusicAudio：NSObject的，AVAudioPlayerDelegate {    重载的init（）{
        super.init（）
        让bassAudioPath = NSBundle.mainBundle（）pathForResource（原始，ofType：MP3）。        让fileURL = NSURL（fileURLWithPath：bassAudioPath）
        bassAudio = AVAudioPlayer（contentsOfURL：fileURL，错误：无）
        bassAudio.currentTime = 0
        bassAudio.volume = 1.0
        bassAudio.delegate =自
    }    FUNC adjustAudioLayerState（volumeOn：BOOL，层：AudioLayerState）{        如果层== {AudioLayerState.Bass
            self.bassAudio。prepareToPlay（）
            self.bassAudio.play（）
        }
    }
}
 

解决方案

由于您的MusicAudio类被释放你没有得到任何声音。你需要做的VAR，声音，一个属性，而不是一个局部变量。

 类的ViewController：UIViewController的{    VAR声音= MusicAudio（）    @IBAction FUNC testSound（）{
        self.sound.adjustAudioLayerState（真，层：AudioLayerState.Bass）
    }}
 

I have created an object class of AVAudioPlayer below in order to play a noise:

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()
        }
    }
}

To play the noise, I call the class via:

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

}

However I am not getting any audio played back, can anyone spot a problem with my implementation?

Edit: After rdelmar answer

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()
        }
    }
}

解决方案

You don't get any sound because your MusicAudio class is being deallocated. You need to make the var, sound, a property, not a local variable.

class ViewController: UIViewController {

    var sound = MusicAudio()

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

}

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