[英]AVAudioPlayer Object Sound Not Playing - Swift
I have created an object class of AVAudioPlayer below in order to play a noise: 我在下面创建了AVAudioPlayer的对象类以播放噪音:
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: 要播放声音,我通过以下方式致电全班:
@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? 但是我没有播放任何音频,有人可以发现我的实现有问题吗?
Edit: After rdelmar answer 编辑:rdelmar回答后
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()
}
}
}
You don't get any sound because your MusicAudio class is being deallocated. 您没有听到任何声音,因为MusicAudio类正在被释放。 You need to make the var, sound, a property, not a local variable. 您需要创建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)
}
}
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