ios - Swift 2.2错误处理和音频

我正在跟踪Swift 1.0(偶然发生)的教程，它显示了如何播放声音。现在在Swift 2.0中，它将无法正常工作，请帮助。

import UIKit
import AVFoundation

class ViewController: UIViewController {



var ButtonAudioURL = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("cow", ofType: "wav")!)
var ButtonAudioPlayer = AVAudioPlayer()
override func viewDidLoad() {
    super.viewDidLoad()
    ButtonAudioPlayer = AVAudioPlayer(contentsOfURL: ButtonAudioURL, error: nil)

}

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

@IBAction func playAudio(sender: AnyObject) {
    ButtonAudioPlayer.play();
}

@IBAction func Stop(sender: AnyObject) {
}

}

最佳答案

使用do-catch语句通过运行代码块ButtonAudioPlayer = try AVAudioPlayer(contentsOfURL: ButtonAudioURL)来处理错误

//ButtonAudioPlayer = AVAudioPlayer(contentsOfURL: ButtonAudioURL, error: nil)
do {
    ButtonAudioPlayer = try AVAudioPlayer(contentsOfURL: ButtonAudioURL)
} catch let error as NSError {
    print(error.localizedDescription)
}