iOS版雨燕：声音不玩iPhone模拟器 [英] iOS Swift: Sound not playing on iPhone Simulator

问题描述

在我的iOS应用斯威夫特，我想上的一个按钮的点击播放声音。

In my iOS Swift application, and i am trying to play sound on click of a button.

func playSound()
    {
        var audioPlayer = AVAudioPlayer()
        let soundURL = NSBundle.mainBundle().URLForResource("doorbell", withExtension: "mp3")
        audioPlayer = AVAudioPlayer(contentsOfURL: soundURL, error: nil)
        audioPlayer.play()
}

我正在运行在iOS中iPhone模拟器中的应用。
我有doorbell.mp3添加到应用程序。在调试模式下，我可以看到，soundURL有一个值，这是不是零。

I am running the application in iOS iPhone Simulator. I have doorbell.mp3 added to the application. In debug mode i can see that soundURL has a value and it is not nil.

有没有错误，但声音不玩了。

There are no errors, but the sound does not play.

推荐答案

您只需将您的audioPlayer申报你的方法。尝试是这样的：

You just need to move the declaration of your audioPlayer out of your method. Try like this:

var audioPlayer:AVAudioPlayer!

func playSound() {
    if let soundURL = NSBundle.mainBundle().URLForResource("doorbell", withExtension: "mp3") {
         audioPlayer = AVAudioPlayer(contentsOfURL: soundURL, error: nil)
         audioPlayer.prepareToPlay()
         audioPlayer.play()
    }
}

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