FInd a view that looks like something you can touch given point

gistfile1.txt

- (UIView*)responderForPoint:(CGPoint)point {
    UIView *rootView = self;
    
    while (1) {
        if (!rootView.superview) {
            rootView = rootView.superview;
        }
    }
    UIView *gameViewRootView = [rootView viewWithTag: NNGameViewRootViewTag];
    
    UIView *responder = [self responderOf: gameViewRootView forPoint:point];
    
    return responder;
}

- (UIView*)responderOf:(UIView*)view forPoint:(CGPoint)point {
    if (view) {
        if (!view.subviews) {
            if (view.userInteractionEnabled) {
                if (CGRectContainsPoint(view.frame, point)) {
                    for (Class allowedResponderClass in (Class)[self allowedResponderClasses]) {
                        if ([view isKindOfClass: allowedResponderClass]) {
                            return view;
                        }
                    }
                }
            }
        } else {
            for (NSUInteger i = 0; i < view.subviews.count; i++) {
                UIView *subview = (UIView*)view.subviews[i];
                UIView *responder = [self responderOf: subview forPoint:point];
                
                if (responder) {
                    return responder;
                }
            }
        }
    }
    
    return nil;
}

- (NSArray*)allowedResponderClasses {
    return [NSArray arrayWithObjects:
            [UIButton class]
            , nil];
}