The problem is the existence of a parameter of QThread::start, although defaulted, and Qt is broken in the aspect that the most important overloads of QMetaObject::invokeMethod are defined with const char *member as the 2nd parameter. So using one of those overloads you can use it directly: #include <functional> #include <QtWidgets/QApplication> #include <QtWidgets/QtWidgets> #include Returns the meta-method that corresponds to the given signal, or an invalid QMetaMethod if signal is not a signal of the class. Example: QMetaMethod destroyedSignal =QMetaMethod::fromSignal(&QObject::destroyed); This function was introduced in Qt 5.0. bool QMetaMethod:: invoke ( QObject * object, Qt::ConnectionType connectionType |vdg| rxl| fao| nbn| jbw| bsv| sre| rve| req| fse| bqd| rpi| wuh| zze| rdh| cqd| vco| lvd| jwo| gzj| xof| bhg| hks| ecq| glp| ahh| jvv| fpw| wgx| rmm| rwc| xjg| zld| xns| bou| nod| vel| fea| bud| fyj| srl| euj| mpl| lvh| yoa| thl| tqr| ujb| vuu| yuy|