Qt原生线程打印日志

#ifndef LOGMSGPRINT_H
#define LOGMSGPRINT_H
#include <QObject>
#include <QQueue>
#include <QMutex>
#include <QThread>
#include <QDebug>
#include <QDir>
#include <QDate>
class LogMsgPrint{
public:
    static LogMsgPrint *Inst()
    {
        static LogMsgPrint LogMsgPrintInstance = {};
        return(&LogMsgPrintInstance);
    }
public:
    bool                            m_logging    = false;
    QMutex                          m_mutexLog   = {};
    QQueue<QString>                 m_queueLog   = {};           // 日志队列
    QThread *                       m_pLogThread = NULL;
public:
    LogMsgPrint()
    {
        if(m_logging == false)
        {
            m_logging = true;
            if(m_pLogThread == NULL)
            {
                m_pLogThread = QThread::create(&LogFun);
            }
        }
    };
    static void LogFun()
    {
        LogMsgPrint *thiz = LogMsgPrint::Inst();
        if(thiz != NULL)
        {
            while(thiz->m_logging == true)
            {
                if(thiz->m_queueLog.empty() == true)
                {
                    QThread::msleep(100);
                    continue;
                }
                thiz->m_mutexLog.lock();
                QString text = thiz->m_queueLog.front();
                thiz->m_queueLog.dequeue();
                thiz->m_mutexLog.unlock();
                thiz->WriteToLogFlie(text);
            }
        }
    };
    void InsertQueue(QString m_txt)
    {
        m_mutexLog.lock();
        m_queueLog.enqueue(m_txt);
        m_mutexLog.unlock();
    }
    void SetPathName(const QString &strPathName)
    {
        QDir dir(strPathName);
        if(!dir.exists())
        {
            dir.mkpath(strPathName);
        }
        m_strPathName = strPathName;
        if(m_pLogThread != NULL)
        {
            m_pLogThread->start();
        }
    }
private:
    QString m_strPathName = QString();
    QString m_strFileName = QString();
    QFile m_outFile={};
    QTextStream m_ts = {};
    void WriteToLogFlie(const QString &strMsg)
    {
        QString strFileName = QString("/%1.log").arg(QDate::currentDate().toString("yyyy-MM-dd"));
        if(m_strFileName.compare(strFileName) != 0)
        {
            if(m_outFile.isOpen() == true)
            {
                m_outFile.close();
            }
            m_strFileName = strFileName;
            m_outFile.setFileName(m_strPathName + strFileName);
            m_outFile.open(QIODevice::WriteOnly | QIODevice::Append);
            m_ts.setDevice(&m_outFile);
        }
        if(m_outFile.isOpen() == true)
        {
            m_ts << strMsg << Qt::endl;
            m_outFile.flush();
        }
    }
public:
    void ClearLogFile()
    {
        QDir dir(m_strPathName);
        if( ! dir.exists() )
        {
           bool isok = dir.mkpath(".");
           if(!isok)
           {
               //TODO:报错
               return;
           }
        }
        foreach(QFileInfo username , dir.entryInfoList(QDir::NoDotAndDotDot|QDir::Dirs))
        {
            QDir userdir(username.absolutePath()+"/"+username.fileName());
            userdir.setNameFilters({"*.log"});
            foreach(QFileInfo logfile, userdir.entryInfoList(QDir::Files | QDir::NoSymLinks))
            {
                QString str = logfile.fileName();
                QStringList listMsg = str.split("-");
                if(listMsg.count() == 3)
                {
                    int year, month,day;
                    year = listMsg[0].toInt();
                    month = listMsg[1].toInt();
                    day = listMsg[2].split(".")[0].toInt();
                    if(QDate(year,month,day).startOfDay().addMonths(3).toTime_t() < QDateTime::currentDateTimeUtc().toTime_t())
                    {
                        QFile(userdir.absoluteFilePath(str)).remove();
                    }
                }
            }
        }
    }
};
#endif // LOGMSGPRINT_H

main.cpp内容：

#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
void customMessageHandler(QtMsgType, const QMessageLogContext &, const QString &strMsg)
{
#else
void customMessageHandler(QtMsgType, const char *strMsg)
{
#endif
    LogMsgPrint::Inst()->InsertQueue(QString("[%1]:%2").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss zzz"), strMsg));
}
int main(int argc, char *argv[])
{
    SetUnhandledExceptionFilter((LPTOP_LEVEL_EXCEPTION_FILTER)TopLevelExceptionFilter);
    if(!IsKeyboardConnection())
    {
        qputenv("QT_IM_MODULE", "tgtsml");
    }
    QtSingleApplication a("QtSingleApplication_Test_id",argc, argv);
    if(a.isRunning())//判断实例是否已经运行
    {
        QMessageBox::warning(NULL, "提示！", "该程序正在运行中！");
        QString str = "该程序正在运行中！当前时间为：" + QDateTime::currentDateTime().toString("yyyy/MM/dd hh:mm:ss");
        a.sendMessage(str, 1000); //1s后激活前个实例
        return EXIT_SUCCESS;
    }
    m_strApplicationPath = a.applicationDirPath() + "/Log";
    LogMsgPrint::Inst()->SetPathName(m_strApplicationPath);
#ifdef  HW_FOR_RELEASE
    #if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
        qInstallMessageHandler(customMessageHandler);
    #else
        qInstallMsgHandler(customMessageHandler);
    #endif
#endif
    qInstallMessageHandler(customMessageHandler);
    App()->show();
    OutputControl * pOutputControl = new OutputControl();
    a.installEventFilter(pOutputControl);
    LogMsgPrint::Inst()->ClearLogFile();
    return a.exec();
}