Question

我试图在应用启动后进行音乐循环播放。没有显示构建错误，但音乐无法播放。这是我在viewDidLoad中的代码。我还在顶部导入了AVFoundation和SpriteKit。（在类似问题中提出的解决方案与Swift 2相关，在Swift 3中不起作用）

    override func viewDidLoad() {

//这里我改变了datepicker的背景颜色

    dateWheel.backgroundColor = .blue
    dateWheel.setValue(UIColor.white, forKeyPath: "textColor")

//应用程序启动后音乐应该开始播放

    func playSound(soundName: String)

    {
        let musicPlay = NSURL(fileURLWithPath: Bundle.main.path(forResource: "chinaAudioNew", ofType: "mp3")!)
        do{
            let audioPlayer = try AVAudioPlayer(contentsOf:musicPlay as URL)
            audioPlayer.prepareToPlay()
            audioPlayer.play()
            audioPlayer.numberOfLoops = -1

        }catch {
            print("Error getting the audio file")
        }
    }



    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

Answer 1

这是你的问题：

let audioPlayer = try AVAudioPlayer(contentsOf:musicPlay as URL)

这是一个本地变量，所以它甚至在有机会开始播放之前就已经不存在了。

循环播放音频音乐的麻烦在viewDidLoad Swift 3中播放

1 个答案: