void outputMessage(QtMsgType type, const
QMessageLogContext &context, const QString &msg)
{
QString text;
switch(type)
{
case QtDebugMsg:
text = QString("Debug:");
break;
case QtWarningMsg:
text = QString("Warning:");
break;
case QtCriticalMsg:
text = QString("Critical:");
break;
case QtFatalMsg:
text = QString("Fatal:");
}
QDateTime current_date_time =
QDateTime::currentDateTime();
QString current_date =
current_date_time.toString("yyyy-MM-dd hh:mm:ss ddd");
QString message =
text.append(msg).append("(").append(current_date).append(")");
QFile file("log.txt");
file.open(QIODevice::WriteOnly |
QIODevice::Append);
QTextStream text_stream(&file);
text_stream<<message<<"\r\n";
file.close();
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
//注册MessageHandler
qInstallMessageHandler(outputMessage);
//打印日志到文件中
qDebug("This is a debug message");
qWarning("This is a warning message");
qCritical("This is a critical message");
qFatal("This is a fatal message");
return app.exec();
}
