Found it: https://github.com/qt/qtbase/blob/5.12/src/corelib/global/qlogging.cpp

Specifically, I needed to set application name in QCoreApplication.

@Dariusz said in qDebug overload, return non const function?:

the virtual QString getDebugData never actually calls the upper inherited classes getDebugData

I don't understand - what do you mean here? I don't see that you call the base class implementation in this function anywhere so how should it be called?

correct @Paul-Colby
thanks

@VRonin
i before write my code to this method 369 book:

void WeatherBalloon::sendDatagram() { QByteArray datagram; QDataStream out(&datagram, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_4_3); out << QDateTime::currentDateTime() << temperature() << humidity() << altitude(); udpSocket.writeDatagram(datagram, QHostAddress::LocalHost, 5824); }

But we want to connect UDP processing data to GUI app, it can not read QDataStream Method and it Crashs. The app is written in C#,So we should try a method that work with VisualStudio.
Agian Than kyou for attention
best regards stackprogramer

@kshegunov Thank you! That was the missing part!!

Thanks for the report !

I was thinking more about QTBUG-47316.

@JKSH Yes the value has been initialized. I init. with some minor calculations such as:
QVector <double> B;
for(int i=1;i<ui->RyadA->text().toInt(0,10)+1;i++){
B.push_back(((double)i/8+1)*(i+1));
}

@SGaist If there is one thing that is for sure; I can destroy any project while doing a "hello world" tutorial! Thanks for the eSupport.

@hskoglund Thanks for the info

Windows? That explains :-)
I tested on Linux.
I don't know how to fix this on Windows.
Maybe this can help you: http://stackoverflow.com/questions/388490/unicode-characters-in-windows-command-line-how

Using QStringList.join you could achieve desired results ;

QStringList list = QStringList() << "one" << "two"; qDebug().noquote() << list.join(", ");

Playing around with this method quite likely gives you output you are after.

Hi @AnantAgrawal,

Just just launch your app from the console. qDebug, qWarning etc. will be printed to the console too (stdout/stderr). Make sure you don't define QT_NO_DEBUG_OUTPUT -- see http://doc.qt.io/qt-5/debug.html for more info.

qDebug().noquote() << QString("I have properly opened file %1").arg(fileName);

But please... don't use non-ascii characters in source code. That's just being mean to others.

@raoulh Thank you ...

OK guys, I was able to solve the problem. The Fedora people changed a configuration file, so that qDebug output wasn't shown to the user anymore, until the user changed the settings like described here:
https://bugzilla.redhat.com/show_bug.cgi?id=1227295

@JR You're welcome :) Personally I neither had any experience in writing iOS apps nor have the necessary hardware/keys/certificates for that. So any input on the subject will be useful (but I doubt that it will be possible to make any enhancements based on that).