QAudioRecorder停止崩溃应用程序

Question

我有一个应用程序记录微。当我按下按钮时，录制开始或停止（取决于状态）。我第一次执行启动/停止但在一段时间后，应用程序在停止功能上崩溃。我似乎是随机的。

//myapp.h

class MyApp : public QObject
{
    Q_OBJECT
public:
    explicit MyApp(QObject *parent = 0);
    ~MyApp();
    void createAudioRecorder();
signals:
    void recordingChanged ( );

public slots:
    void toogleRecord( );
private:
    QAudioRecorder *myAudioRecorder;
    QString pathAudioFile;
};

//myapp.cpp

MyApp::MyApp(QObject *parent) : QObject(parent)
{
    createAudioRecorder();
}

MyApp::~MyApp()
{

}


void MyApp::createAudioRecorder()
{
    myAudioRecorder= new QAudioRecorder(this);
    pathAudioFile = QDir::currentPath();
    pathAudioFile+="/audio.flac";
    myAudioRecorder -> setOutputLocation ( QUrl(pathAudioFile));
    QAudioEncoderSettings audioSettings;
    audioSettings.setCodec("audio/FLAC");
    myAudioRecorder->setEncodingSettings(audioSettings);
}

void MyApp::toogleRecord(){

    qDebug()<<"before,  state myAudioRecorder"<<myAudioRecorder<<myAudioRecorder->state();

    switch (myAudioRecorder->state()) {
    case QMediaRecorder::StoppedState:
        myAudioRecorder->record();
        break;
    case QMediaRecorder::RecordingState :
        myAudioRecorder->stop(); //<------------crash here
        break;
    case QMediaRecorder::PausedState:
        break;
    default:
        break;
    }
        qDebug()<<"after,  state myAudioRecorder"<<myAudioRecorder<<myAudioRecorder->state()<<"\n";
}

我不明白它的来源。

---

编辑： 调试无法帮助我找到答案。

我还显示改变状态和改变状态。似乎问题在于开始录音而不是停止（在录音机状态失败之前＆＃39;录音＆＃34;

好记录：

                 |State       | Status   |
-----------------|------------|----------|
clic to start >  |            |          |
                 |Recording   |          |
                 |            | Starting |
                 |            | Recording|
clic to stop >   |            |          |
                 |Stopped     |          |  
                 |            |Finalizing|
                 |            |Loaded    |

记录期间出错：

                 |State       | Status   |
-----------------|------------|----------|
clic to start >  |            |          |
                 |Recording   |          |
                 |            | Starting |
clic to stop >   |            |          |

---

我找到了一个防止崩溃的解决方案，但它并不漂亮。如果audioRecorder在StratingStatus或FinalizingStatus上，我重新创建AudioRecorder。

void MyApp::toogleRecord(){

    switch (myAudioRecorder->status()) {
    case QMediaRecorder::LoadedStatus:
        myAudioRecorder->record();
        break;
    case QMediaRecorder::StartingStatus:
        qDebug()<<"ok je suis là en starting";
        createAudioRecorder();
        break;
    case QMediaRecorder::RecordingStatus    :
        myAudioRecorder->stop();
        break;
    case QMediaRecorder::FinalizingStatus:
        qDebug()<<"ok je suis là en finalizing";
        createAudioRecorder();
        break;
    default:
        break;
    }
}

如果您有其他想法，为什么audioRecording保持状态＆＃34;开始＆＃34;或者＆＃34;最终确定＆＃34;，不要犹豫。