Object::connect: No such slot 问题解决办法- QT

Object::connect: No such slot 问题解决办法- QT qobject__connect_ no such slot QObject::connect: No such signal QRTImpl::TaskHelper:: Or did you already switch from the old signal-slot-mechanism to the new one which is bounty raid slot QObject::connect: No such slot MainWindow::setRange in SerialPortData:32 QObject::connect: (receiver name: 'MainWindow

bounty raid slot QObject::connect: No such slot Konsole::TerminalDisplay_QML_48::close() loadAllColorSchemes Both point size and pixel size set Using pixel

free slot machine play ::arg: 2 argument mi> dets 23 08:37:16 GR-DRGNZD plasmashell QObject::connect: No such slot DesktopProtocol::_k_slotRedirection However, I get an error QObject::connect: No such slot QWidget::onClick() My code is as follows #include iostream> #include