EZAudio 不起作用：创建 EZRecorder 实例时的 Thread1 EXC_BAD_ACCESS

Posted 2023-02-23

【中文标题】EZAudio 不起作用：创建 EZRecorder 实例时的 Thread1 EXC_BAD_ACCESS

【英文标题】：EZAudio doesnt work: Thread1 EXC_BAD_ACCESS while creating EZRecorder instance

【发布时间】：2016-12-12 15:03:55

【问题描述】：

我对@9​​87654324@的完整实现：​​

class ViewController: UIViewController, EZMicrophoneDelegate, EZRecorderDelegate 

    @IBOutlet var recordingAudioPlot: EZAudioPlot!

    private var isRecording = false 

        didSet 

            if isRecording 

                player.pause()
                recordingAudioPlot.clear()
                microphone.startFetchingAudio()
                recorder = EZRecorder(url: filePathUrl(), clientFormat: microphone.audiostreamBasicDescription(), fileType: EZRecorderFileType.M4A, delegate: self) 
                // ** Here is where the error occurs **

             else 

                recorder.delegate = nil
                microphone.stopFetchingAudio()
                recorder.closeAudioFile()

                player.playAudioFile(EZAudioFile(url: filePathUrl()))
            
        
    
    private var microphone = EZMicrophone()
    private var recorder = EZRecorder()
    private var player = EZAudioPlayer()

    @IBAction func startStopRecordingButtonTapped(_ sender: UIButton) 
        isRecording = !isRecording
    

    override func viewDidLoad() 
        super.viewDidLoad()

        let session = AVAudioSession.sharedInstance()
        try! session.setCategory(AVAudioSessionCategoryPlayAndRecord)
        try! session.setActive(true)

        microphone.delegate = self

        try! session.overrideOutputAudioPort(.speaker)
    

    func microphone(_ microphone: EZMicrophone!, hasAudioReceived buffer: UnsafeMutablePointer<UnsafeMutablePointer<Float>?>!, withBufferSize bufferSize: UInt32, withNumberOfChannels numberOfChannels: UInt32) 

        DispatchQueue.main.async 
            self.recordingAudioPlot.updateBuffer(buffer[0], withBufferSize: bufferSize)
        
    

    func microphone(_ microphone: EZMicrophone!, hasBufferList bufferList: UnsafeMutablePointer<AudioBufferList>!, withBufferSize bufferSize: UInt32, withNumberOfChannels numberOfChannels: UInt32) 

        if isRecording 
            recorder.appendData(from: bufferList, withBufferSize: bufferSize)
        
    

    private func filePathUrl() -> URL 

        let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first ?? ""

        return URL(fileURLWithPath: String(format: "%@/%@", path, "pathtofile.m4a"))
    

错误如下：

出了什么问题？

【问题讨论】：

您是否检查过所有变量是否设置正确，尤其是 filePathURL 和 asbd ？

filePathUrl 是正确的...什么是 asbd？

audiostreambasicdescription... 第二个参数，一般来说：您正在尝试访问该上下文中不再存在的内存地址上的对象...因此请检查哪些对象可能不存在存在的...在 xcodes 调试器视图中应该很容易做到

但我从示例中得到它......它在那里工作......看看这里：github.com/syedhali/EZAudio/blob/master/EZAudioExamples/iOS/…

@Volker 好的，我会在一小时内打印出来并通知您...

【参考方案1】：

解决方案是将recorder 声明为可选类型，而不是实例：

private var recorder: EZRecorder?

当它第一次尝试解除分配第一个初始化的记录器时发生了一些事情......但现在有 nil 所以错误不再存在。