Checking whether ViewController is presented as Modal

UIViewController+ModalCheck.h

// UIViewController+ModalCheck.h
//
// Created by Felipe Sabino on 06/14/11

#import <UIKit/UIKit.h>

@interface UIViewController (ModalCheck)

-(BOOL)isPresentedAsModal;

@end

UIViewController+ModalCheck.m

// UIViewController+ModalCheck.m
//
// Created by Felipe Sabino on 06/14/11

#import "UIViewController+ModalCheck.h"

@implementation UIViewController (ModalCheck)

-(BOOL)isPresentedAsModal {

     BOOL isModal = ((self.parentViewController && self.parentViewController.modalViewController == self) || 
            //or if I have a navigation controller, check if its parent modal view controller is self navigation controller
            ( self.navigationController && self.navigationController.parentViewController && self.navigationController.parentViewController.modalViewController == self.navigationController) || 
            //or if the parent of my UITabBarController is also a UITabBarController class, then there is no way to do that, except by using a modal presentation
            [[[self tabBarController] parentViewController] isKindOfClass:[UITabBarController class]]);

    //iOS 5+
    if (!isModal && [self respondsToSelector:@selector(presentingViewController)]) {

        isModal = ((self.presentingViewController && self.presentingViewController.modalViewController == self) || 
             //or if I have a navigation controller, check if its parent modal view controller is self navigation controller
             (self.navigationController && self.navigationController.presentingViewController && self.navigationController.presentingViewController.modalViewController == self.navigationController) || 
             //or if the parent of my UITabBarController is also a UITabBarController class, then there is no way to do that, except by using a modal presentation
             [[[self tabBarController] presentingViewController] isKindOfClass:[UITabBarController class]]);

    }

    return isModal;        

}

@end