상위 ViewController 가져오기
vc = (UIViewController*)[btn.superview nextResponder];
vc = (UIViewController*)[view.superview nextResponder];
Returns the receiver's next responder, or
nil if it has none.
- (UIResponder *)nextResponder
The next object in the responder chain to be presented with an event for handling.
UIResponder class does not store or set the next responder automatically, instead returning
nil by default. Subclasses must override this method to set the next responder.
UIViewimplements this method by returning the
UIViewController object that manages it (if it has one) or its superview (if it doesn’t);
UIViewController implements the method by returning its view’s superview;
UIWindow returns the application object, and
- Available in iOS 2.0 and later.