ios - 线程 1 : EXC_BAD_ACCESS (code=1, 地址=0x48)

Question

我在 XCODE 上使用 swift。我遇到了这个问题，如果我想点击我的按钮来播放我的声音。它会崩溃。我有 View Controller 。第一个 View Controller 连接到一个 Storyboard。那个 Storyboard有一个按钮播放声音。当我运行它时，声音会播放。当它转到第二个 Storyboard播放声音时它崩溃了

[2张图片是我用来播放音频的代码。我在第一个 View Controller 上粘贴了相同的代码。] 这是第二个 View Controller 上的内容。当我按下第二个 Storyboard上的按钮时，我得到了 Thread 1: EXC_BAD_ACCESS (code=1, address=0x48) 但在我按下的第一个按钮上没有出现此错误。

当我运行模拟器并到达第二个 View Controller 时会发生这种情况

class Level1ViewController: UIViewController, AVAudioPlayerDelegate {

    var player: AVAudioPlayer = AVAudioPlayer()
    var correctPlayer: AVAudioPlayer = AVAudioPlayer()
    var wrongPlayer: AVAudioPlayer = AVAudioPlayer()




    @IBAction func correctAnswer(_ sender: Any) {
        correctPlayer.play()
    }

    @IBAction func playOne(_ sender: Any) {
        player.play()
    }
    @IBOutlet weak var option2: UIButton! // wrong answer

    @IBAction func wrongAnswer1LV(_ sender: Any) {
    }


    @IBOutlet weak var option1: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()


        //View Controller 1 - Working

        do {
            let audioPlayer = Bundle.main.path (forResource: "bark", ofType: "wav")

            try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer!)as URL)
        }

        catch {
            //ERROR!
        }

        do {
            let audioPlayer2 = Bundle.main.path (forResource: "Ding-Sound-Effect_qZC5gtOw3DU", ofType: "mp3")

            try correctPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer2!)as URL)
        }

        catch {
            //ERROR!
        }

View Controller 2 - 不工作(给出错误)

class Level2LevelViewController: UIViewController, AVAudioPlayerDelegate {

    var player: AVAudioPlayer = AVAudioPlayer()
    var correctPlayer: AVAudioPlayer = AVAudioPlayer()
    var wrongPlayer: AVAudioPlayer = AVAudioPlayer()

    @IBAction func levelTwoPLay(_ sender: Any) {
        correctPlayer.play()  **** THREAD 1: EXC_BAD_ACESS****
    }



    override func viewDidLoad() {
        super.viewDidLoad()


        do {
            let audioPlayerII = Bundle.main.path (forResource: "Door Open and Close Slam Sound Effects", ofType:"mp3")

            try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayerII!)as URL)
        }

        catch {
            //ERROR!!
        }

    leveltwoOp1.backgroundColor = UIColor.black
    leveltwoOp2.backgroundColor = UIColor.black
    leveltwoOpTh.backgroundColor = UIColor.black
    leveltwoOp4.backgroundColor = UIColor.black

Answer 1

您正在 View Controller 1 中创建一个 correctPlayer 对象，并使用以下代码对其进行初始化:

try correctPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer2!)as URL)

没关系....但是在 View Controller 2 中，您有:

var correctPlayer: AVAudioPlayer = AVAudioPlayer()

它创建了一个 correctPlayer 的新实例，它只在 View Controller 2 的范围内，然后您调用:

correctPlayer.play()

没有初始化它。

在 View Controller 2 中你需要再次调用:

    do {
        let audioPlayer2 = Bundle.main.path (forResource: "Ding-Sound-Effect_qZC5gtOw3DU", ofType: "mp3")

        try correctPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPlayer2!)as URL)
    }

    catch {
        //ERROR!
    }

之后您应该可以播放该声音。