iOS Swift：声音没有播放 [英] iOS Swift: Sound not playing

问题描述

在我的iOS Swift应用程序中，我试图点击按钮播放声音。

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()
}

I我在iOS iPhone模拟器中运行应用程序。
我已将doorbell.mp3添加到应用程序中。在调试模式下，我可以看到soundURL有一个值，它不是零。

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.

没有错误，但声音没有播放。

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

推荐答案

您只需要将audioPlayer的声明移出您的方法。试试这样：

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

Swift 3或更高版本

var audioPlayer = AVAudioPlayer()

func playSound() throws {
    let url = Bundle.main.url(forResource: "doorbell", withExtension: "mp3")!
    audioPlayer = try AVAudioPlayer(contentsOf: url)
    audioPlayer.prepareToPlay()
    audioPlayer.play()
}

---

---

do { 
    try playSound() 
} catch { 
    print(error)
}

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