QT中的日志设置

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:");
		break;

	case QtCriticalMsg:
		text = QString("Critical:");
		break;

	case QtFatalMsg:
		text = QString("Fatal:");
	}

	QString context_info = QString("File:(%1) Line:(%2)").arg(QString::fromLocal8Bit(context.file)).arg(context.line);
	QString current_date_time = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss.zzz ddd");//如果不想打印毫秒级别的，可以散掉 .zzz
	QString current_date = QString("(%1)").arg(current_date_time);
	QString message = QString("%1          %2 %3 %4").arg(current_date).arg(text).arg(context_info).arg(msg);
	QString LogPath = QCoreApplication::applicationDirPath();
	LogPath.append("/log");
	QDir dir(LogPath);
	if (!dir.exists(LogPath))
	{
		dir.mkdir(LogPath);
	}
	QString logFile = LogPath + "/" + QDateTime::currentDateTime().toString("yyyy-MM-dd");
	logFile.append(".txt");
	QFile file(logFile);
	file.open(QIODevice::WriteOnly | QIODevice::Append);
	QTextStream text_stream(&file);
	text_stream << message << "\r\n";
	file.flush();
	file.close();

	mutex.unlock();
}

qInstallMessageHandler(outputMessage);

注意：需要注册一下这个，调用最后一行的代码。

标签：context,QT,text,LogPath,QString,设置,arg,date,日志
来源： https://blog.csdn.net/qq_42317817/article/details/122608386