QObject::connect: No such slot

juve938383

Hello!
I am using a connect function but it will not recognize my variable as a slot even though it is such. Here is a part of the code.

gameclass.h

class   GameLoop : public QGraphicsView
{
...
public slots:
    void                                    multiply_ghosts();
};

gameclass.cpp

#include "gameclass.h"

void    GameLoop::ft_roll_game()
{
    timer_multi = new QTimer();
    QObject::connect(timer_multi, SIGNAL(timeout()), this, SLOT(multiply_ghosts()));
    timer_multi->start(3000);
}

void    GameLoop::multiply_ghosts(){
    std::cout<<"Multiplying";
}

I get this warning and the message does not show in console(which means the timer is not working):
qt.core.qobject.connect: QObject::connect: No such slot QGraphicsView::multiply_ghosts() in ..

mchinand

Switch to the new(er) connect syntax so you may get a more detailed error message at compile time instead of run time:

QObject::connect(timer_multi, &QTimer::timeout, this, &GameLoop::multiply_ghosts);

Also, you didn't show all of your GameLoop header, does it include the Q_OBJECT macro?

juve938383

Thanks! It worked thanks to the newer syntax.