qDebug Qt控制台应用程序输出到Qt Creator应用程序输出 [英] qDebug Qt console application to output to Qt Creator application output
本文介绍了qDebug Qt控制台应用程序输出到Qt Creator应用程序输出的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何在Qt控制台应用程序中使用qDebug输出到Qt Creator应用程序输出窗口?目前,qDebug写入控制台窗口,这会干扰非调试输出。
在Qt GUI应用程序中使用qDebug默认输出到应用程序输出窗口。
解决方案
要将QDebug重定向到多个地方,您可能需要编写一些代码,也许是这样的:
QList< QtMsgHandler> messageHandlers_;
static void messageDispatcher(QtMsgType type,const char * msg)
{
foreach(QtMsgHandler callback,:: messageHandlers_)
callback(type,msg);
}
static void messageLogger(QtMsgType type,const char * msg)
{
QString输出;
switch(type){
case QtDebugMsg:output = QString(mesage:%1\\\
)。arg(msg);打破;
case QtWarningMsg:output = QString(warning:%1\\\
)。arg(msg);打破;
case QtCriticalMsg:output = QString(critical:%1\\\
)。arg(msg);打破;
case QtFatalMsg:output = QString(fatal:%1\\\
)。arg(msg);打破;
default:return;
}
QFile文件(log.txt);
if(file.open(QIODevice :: WriteOnly | QIODevice :: Append))
QTextStream(& file)<<输出;
}
int main()
{
...
:: messageHandlers_.append(messageLogger)
qInstallMsgHandler(messageDispatcher);
...
}
How do I use qDebug in a Qt console application to output to the Qt Creator "application output" window? Currently qDebug writes to the console window which interferes with the non-debug output.
Using qDebug in a Qt GUI app outputs to application output window by default.
解决方案
To redirect QDebug to multiple places, you might have to write some code, maybe like this:
QList<QtMsgHandler> messageHandlers_;
static void messageDispatcher(QtMsgType type, const char *msg)
{
foreach (QtMsgHandler callback, ::messageHandlers_)
callback(type, msg);
}
static void messageLogger(QtMsgType type, const char *msg)
{
QString output;
switch (type) {
case QtDebugMsg: output = QString("mesage: %1\n").arg(msg); break;
case QtWarningMsg: output = QString("warning: %1\n").arg(msg); break;
case QtCriticalMsg: output = QString("critical: %1\n").arg(msg); break;
case QtFatalMsg: output = QString("fatal: %1\n").arg(msg); break;
default: return;
}
QFile file("log.txt");
if (file.open(QIODevice::WriteOnly | QIODevice::Append))
QTextStream(&file) << output;
}
int main()
{
...
::messageHandlers_.append(messageLogger)
qInstallMsgHandler(messageDispatcher);
...
}
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