当我尝试使用 swift 播放音频文件时应用程序崩溃

Posted 2023-03-07

【中文标题】当我尝试使用 swift 播放音频文件时应用程序崩溃

【英文标题】：Application crashing when I try to play audio file using swift

【发布时间】：2015-10-08 01:30:57

【问题描述】：

func playCorrectSound() 
    let soundURL: NSURL = NSBundle.mainBundle().URLForResource("correct", withExtension: "m4a")!
    correctSound = try! AVAudioPlayer(contentsOfURL: soundURL)
    correctSound.play()




func textFieldShouldReturn(textField: UITextField) -> Bool 
    if correctIncorrectField.text == answerField.text && correctIncorrectField.text != "" && answerField.text != "" 
        pointsNum = pointsNum + 10
        points.text = "\(pointsNum)"
        textField.text = ""
        textField.hidden = true
        correctIncorrect.hidden = false
        correctIncorrect.textColor = UIColor.greenColor()
        correctIncorrect.text = "Correct!"
        pauseAndDoStuff()
        playCorrectSound()

    
    if correctIncorrectField.text != answerField.text && correctIncorrectField.text != "" && answerField.text != "" 
        pointsNum = pointsNum - 5
        points.text = "\(pointsNum)"
        textField.text = ""
        textField.hidden = true
        correctIncorrect.hidden = false
        correctIncorrect.textColor = UIColor.redColor()
        correctIncorrect.text = "Incorrect!"
        pauseAndDoStuff()
    
    textField.resignFirstResponder()
    return true

由于某种原因，它崩溃了

let soundURL: NSURL = NSBundle.mainBundle().URLForResource("correct", withExtension: "m4a")!

一行和它唯一的说法：

致命错误：在展开 Optional 值时意外发现 nil。

【问题讨论】：

What does "fatal error: unexpectedly found nil while unwrapping an Optional value" mean?的可能重复

【参考方案1】：

确保您的项目中存在correct.m4a 文件

并且它包含在Copy Bundle ResourcesTarget -> Build Phases中