Find the ViewController that contains a UIView

UIView (FindUIViewController)

// http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone

@interface UIView (FindUIViewController)
- (UIViewController *)firstAvailableUIViewController;
- (id)traverseResponderChainForUIViewController;
@end

@implementation UIView (FindUIViewController)
- (UIViewController *)firstAvailableUIViewController
{
    // convenience function for casting and to "mask" the recursive function
    return (UIViewController *)[self traverseResponderChainForUIViewController];
}

- (id)traverseResponderChainForUIViewController
{
    id nextResponder = [self nextResponder];
    
    if ([nextResponder isKindOfClass:[UIViewController class]]) {
        return nextResponder;
    
    } else if ([nextResponder isKindOfClass:[UIView class]]) {
        return [nextResponder traverseResponderChainForUIViewController];
    
    } else {
        return nil;
    
    }
}

@end