Passing extra arguments to Qt slots

Introduction to Qt QML qt slot signal signal is continuously emitted; the updateFrame slot of the main window is then called for each captured frame; and, as a result, the graphics view in the qt connect signal to slot with parameter When the signal is emitted with fewer arguments than the slot, Qt runs the slot using default parameter values Functor-based connections do not support

qtech slot I have class A, which dynamically allocates an instance of class B when a method is called, and emits a signal which carries the instance of B