No in many cases (e.g. just passing a simple variable to the macro). The definition is inside qglobal.h: # define Q_UNUSED(x) (void)x; To disable unused variable warnings. You can use the variable after this macro without any problem. However, if you pass an expression or something else to the macro and the compiler has to … Read more
You can use this QString constructor for conversion from QByteArray to QString: QString(const QByteArray &ba) QByteArray data; QString DataAsString = QString(data);
qmake-qt5 –version or qmake –version
There is one main difference between their targetted reuse: .pro This is usually called Project File. .pri This is usually called Project Include File. As you can see in their names, the main difference is that .pri files are meant to be include files. That is similar to including modules in programming language to share … Read more
Well, the Qt FAQ says: int main(int argc, char **argv) { QApplication app(argc, argv); QString str1 = “Test”; QByteArray ba = str1.toLocal8Bit(); const char *c_str2 = ba.data(); printf(“str2: %s”, c_str2); return app.exec(); } So perhaps you’re having other problems. How exactly doesn’t this work?