I am using vtk QT, i've installed VTK, PCL libraries well, after run the project the realese mode; i found the following error. QWidget: Must construct a QApplication before a QWidget
As the error message says, you will need to create a QApplication before you can instantiate and use a QWidget . For example:
#include <QApplication>
#include <QDialog>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QDialog dialog;
dialog.setModal(true);
dialog.show();
return app.exec();
}
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