Warning while adding and using a new method in external library protocol

Question

I am using a external library and one of my view controller is registering as delegate for a class in that framework. Now, at one place I want to execute some code on this d

Answer 1

The property libraryController.delegate is defined in the external library to conform to LibraryDelegate. Try to downcast to MyExtendedDelegate before you call the method from your extended protocol.

if ([self.libraryController.delegate conformsToProtocol:@protocol(MyExtendedDelegate)])
{
    id extendedDelegate = (id)self.libraryController.delegate;
    if ([extendedDelegate respondsToSelector:@selector(actionTaken)])
    {
        [extendedDelegate actionTaken];
    }
}