ios - Swift 声音重复

Question

我有这个功能，我在第一个场景中赋予它生命:

    func ThemeSound() {
        if let path = NSBundle.mainBundle().pathForResource("InfinityThemeMain", ofType: "wav") {
            let enemy1sound = NSURL(fileURLWithPath:path)
            println(enemy1sound)

            var error:NSError?
            ThemePlayer = AVAudioPlayer(contentsOfURL: enemy1sound, error: &error)
            ThemePlayer.prepareToPlay()
            ThemePlayer.play()
        }
    }

但问题是，它只播放一次主题。我需要它重复播放。我以为我知道如何实现这一目标。

runAction(SKAction.repeatActionForever(SKAction.sequence([SKAction.runBlock(ThemePlayer), SKAction.waitForDuration(2.55)]))

但是我不能粘贴到 ViewController 中，因为 runAction 需要一个子项来附加它。还有其他方法吗？

Answer 1

只需将 numberOfLoops 属性设置为负数即可。

ThemePlayer.numberOfLoops = -1

来自 the documentation :

numberOfLoops The number of times a sound will return to the beginning, upon reaching the end, to repeat playback.

...

var numberOfLoops: Int

...

A value of 0, which is the default, means to play the sound once. Set a positive integer value to specify the number of times to return to the start and play again. For example, specifying a value of 1 results in a total of two plays of the sound. Set any negative integer value to loop the sound indefinitely until you call the stop method.

您可能还需要 make your AVAudioPlayer a property, rather than a local variable .就目前而言，使用自动引用计数，我认为您的本地 ThemePlayer 实例可能会被 ARC 释放。比我更了解 AVAudioPlayer 的人可能会对此发表评论。

(顺便说一句，您可能希望遵循 Apple 命名对象实例的惯例，以小写字母开头，例如 themePlayer 而不是 ThemePlayer。它会让您的其他人更容易阅读代码。)