Qt5 自定义日志

#include <QLoggingCategory>

#include <QTextStream>

#include <QDateTime>

#include <QFile>

#include <QMutex>

#define LOGFILEMAX 10000

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

{

 static QMutex mutex;

 mutex.lock();

 QString text;

 switch(type)

 {

 case QtDebugMsg:

 text = QString("Debug:");

 break;

 case QtWarningMsg:

 text = QString("Warning:");

 mutex.unlock();

 return;

 break;

 case QtCriticalMsg:

 text = QString("Critical:");

 break;

 case QtFatalMsg:

 text = QString("Fatal:");

 }

 QString context_info = QString("File:(%1) Line:(%2)").arg(QString(context.file)).arg(context.line);

 QString current_date_time = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");

 QString message = QString("%1 %2 %3").arg(current_date_time).arg(text).arg(msg);

 QFile file("log.txt");

 file.open(QIODevice::WriteOnly | QIODevice::Append);

 QTextStream text_stream(&file);

 text_stream << message << "\r\n";

 file.flush();

 file.close();

 mutex.unlock();

}

int main(int argc, char *argv[])

{

// QLoggingCategory::setFilterRules(QStringLiteral("qt.custom.log.debug=false"));

 //注册MessageHandler

 qInstallMessageHandler(outputMessage);

 //打印日志到文件中

 qDebug("This is a debug message");

文章来源: blog.csdn.net，作者：网奇，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/jacke121/article/details/78425908