Error: no matching member function for call to 'connect'

8Observer8

Hi,

How to solve the error error: no matching member function for call to 'connect' in the example:

#include <QApplication>
#include <QWidget>
#include <QTimer>
#include <QDebug>

class Widget : public QWidget
{
    Q_OBJECT
public:
    Widget(QWidget *parent = nullptr) : QWidget(parent) {
        connect(m_timer, &QTimer::timeout, this, &Widget::printMessage);
    }
private slots:
    void printMessage() {
        qDebug() << "timer";
    }
private:
    QTimer m_timer;
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}

J.Hilk

@8Observer8 your m_timer is on the stack therefore

connect(&m_timer, &QTimer::timeout, this, &Widget::printMessage);

8Observer8

Thank you very much! But now I have another error in the example above: https://forum.qt.io/topic/117951/error-undefined-reference-to-vtable-for-widget