AVFoundation - 播放wav文件（外部應用程序包）Swift 2.1

Question

我只是試驗了一下Swift（第一次）。除了錯誤檢查和正確的應用程序結構，我認爲這應該播放音頻：

import Foundation 
import AVFoundation 

var audioPlayer: AVAudioPlayer! 
let file = "/Users/mtwomey/Desktop/test1/test1/a2002011001-e02.wav" 

let url = NSURL(fileURLWithPath: file) 
print(url) 
audioPlayer = try! AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: file), fileTypeHint: "wav") 
audioPlayer.play() 
print("Done.") 

但它並不是。當我運行這個應用程序時，它簡單地繼續打印「完成」。並退出。如果文件名/文件路徑不正確，我會得到一個異常（因此它實際上正在訪問該文件）。

我試圖證明一個控制檯應用程序的概念，它需要訪問應用程序包之外的wave文件。關於我失蹤的任何提示？

Answer 1

試試這個，

import UIKit 
import AVFoundation 

class ViewController: AVAudioPlayerDelegate{ 
var audioPlayer: AVAudioPlayer! // Declaring this outside your function, as class variable is important! otherwise your player won't be able to play the sound. 

override func viewDidLoad() { 
    super.viewDidLoad() 
    self.playSound("/Users/mtwomey/Desktop/test1/test1/a2002011001-e02.wav") 
} 

func playSound(soundPath: String) 
{ 
    let sound = NSURL(fileURLWithPath: soundPath) 
    do{ 
     audioPlayer = try AVAudioPlayer(contentsOfURL: sound, fileTypeHint: "wav") 
     audioPlayer.prepareToPlay() 
     audioPlayer.delegate = self 
     audioPlayer.play() 
    }catch { 
     print("Error getting the audio file") 
    } 
} 

或者（如果你已經擺在你的項目中的文件）（關注這個blog post找出如何將文件放置在您的項目）

import UIKit 
import AVFoundation 

class ViewController: AVAudioPlayerDelegate{ 
var audioPlayer: AVAudioPlayer! // Declaring this outside your function, as class variable is important! otherwise your player won't be able to play the sound. 

override func viewDidLoad() { 
    super.viewDidLoad() 
    self.playSound("sound-name") 
} 

func playSound(soundName: String) 
{ 
    let sound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(soundName, ofType: "wav")!) 
    do{ 
     audioPlayer = try AVAudioPlayer(contentsOfURL: sound, fileTypeHint: "wav") 
     audioPlayer.prepareToPlay() 
     audioPlayer.delegate = self 
     audioPlayer.play() 
    }catch { 
     print("Error getting the audio file") 
    } 
}