子类可以使用超类Ios的委托方法吗

Question

Is it possible to use a delegate of superclass on subclass

Example: Class A is superclass of class B and superclass A uses the text view method example textviewDidChange. can I somehow call [super textViewDidChange] of superclass A on Subclass B even it isn't on header file of class A if i rediclare the method on subclass B

Answer 1

When you specify UITextViewDelegate , you're telling the compiler that your class meets the specifications for a UITextViewDelegate . If class A has all the requirements for a UITextViewDelegate , and class B is a subclass, then it too will have all the requirements. Nothing will stop you from assigning any instance as a delegate , so you still have to be careful with that.

Answer 2

Yes,you can. Since class A confirms <UITextViewDelegate> protocol there is no need to redeclare them in header file. Just make sure it implements needed methods.