笔记：Qt开发之定制化qDebug()函数

int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    // 改变缺省消息处理程序的输出，信息：线程：功能函数(行数)：时间
    qSetMessagePattern("%{message} :id=%{threadid} %{function}(%{line}):%{time [hh:mm:ss zzz]}");

    // 打印信息
    qDebug("This is a debug message.");
    qInfo("This is a info message.");
    qWarning("This is a warning message.");
    qCritical("This is a critical message.");
    //qFatal("This is a fatal message.");

    ...
    return app.exec();
}

This is a debug message. :id=815 main(217):[11:37:24 843]
This is a info message. :id=815 main(218):[11:37:24 843]
This is a warning message. :id=815 main(219):[11:37:24 844]
This is a critical message. :id=815 main(220):[11:37:24 844]