super respondsToSelector: returns true but actually calling super (selector) gives “unrecognized selector sent to instance”

Question

OK, I am a little confused.

I have a subclass of UIScrollView, which is my attempt at a horizontally scrolling \"table view\" like UI element. UIScrollView itself s

Answer 1

Unless you override responds to selector in your class you will be using the default implementation when you call super which will check the current instance. If you want to see if a instance of a type of object responds to a selector use +(BOOL)instancesRespondToSelector:(SEL)aSelector;

This will check the object and its parent objects. So in your case you want to the following:

[UIScrollView instancesRespondToSelector:@selector(gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:)]