播放音频文件时找不到 'PathForResource' 的过载

Question

我有一个 Swift 文件在 Xcode6 中运行良好。当我升级到 Xcode7 时，我现在收到阻止程序编译的错误。下面是不起作用的代码片段。我收到的错误只是指出 "Could not find overload for 'PathForResource' that accepts the supplied arguments."

func playRecord(sender:UITapGestureRecognizer){

    var tag = sender.view!.tag
    let sound:NSURL

    switch tag{

    case 0: // red
    sound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("red", ofType: "wav")!)!

    case 1: // blue
        sound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("blue", ofType: "wav")!)!

    case 2: // white
    sound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("white", ofType: "wav")!)!


    default:
    sound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("red", ofType: "wav")!)!

    }
    do {
        audioPlayer = try AVAudioPlayer(contentsOfURL: sound)
    } catch _ {
        audioPlayer = nil
    }
    audioPlayer.prepareToPlay()
    audioPlayer.play()


}

Answer 1

Swift 2 的感叹号太多了，因为 fileURLWithPath 现在 returns NSURL 而不是 NSURL?。

具体来说，更改为：

sound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("red", ofType: "wav")!)!

为此：

sound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("red", ofType: "wav")!)

…问题应该消失了。

播放音频文件时找不到 'PathForResource' 的过载

Could not find overload for 'PathForResource' when playing audio file

ios

swift

xcode7

swift2