你不妨回答:你调用(或准备调用) 的是下面的哪一个?
QMetaObject::Connection connect(const QObject * sender, const char * signal, const QObject * receiver, const char * method, Qt::ConnectionType type = Qt::AutoConnection)
QMetaObject::Connection connect(const QObject * sender, const QMetaMethod & signal, const QObject * receiver, const QMetaMethod & method, Qt::ConnectionType type = Qt::AutoConnection)
QMetaObject::Connection connect(const QObject * sender, PointerToMemberFunction signal, const QObject * receiver, PointerToMemberFunction method, Qt::ConnectionType type)
QMetaObject::Connection connect(const QObject * sender, PointerToMemberFunction signal, Functor functor)
QMetaObject::Connection connect(const QObject * sender, PointerToMemberFunction signal, const QObject * context, Functor functor, Qt::ConnectionType type)