ios - Swift 2.2 错误处理和音频

Question

我正在学习 swift 1.0 的教程(偶然)，它展示了如何播放声音。现在在 swift 2.0 中它不会工作请帮助。

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) {
}

Answer 1

使用 do-catch 语句通过运行一段代码来处理错误 ButtonAudioPlayer = try AVAudioPlayer(contentsOfURL: ButtonAudioURL)

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