Proper way to check QObject derived class type in Qt

Question

Lets say I have a two classes:

class A : public QObject {};
class B : public QObject {};

then I go

QObject *a = new A();
QObje         


        

Answer 1

You can use qobject_cast(instance) on QObject derived classes and check the return value. If instance cannot be cast to MyClass*, the return value will be NULL.