QT 输出重定向到文件

void  qtLogToFile(QtMsgType type, const QMessageLogContext &context, const QString &msg)

{
 

    const std::string logTypes[] = { "Debug", "Warning", "Critical", "Fatal", "Info" };

    std::cout << "[Qt]  [" << logTypes[type] << "]  " << msg.toLocal8Bit().constData();

#ifndef NDEBUG

    std::cout << "  (" << context.file << ": " << context.line << ", " << context.function;

#endif

    std::cout << std::endl;

}

void initLog()

{
 

    QString logDir = QApplication::applicationDirPath() + "/log";

    QDir dir;

    if(!dir.exists(logDir))

        dir.mkdir(logDir);

    QString logFile = logDir + "/log.txt";