How to ignore the UINavigateController

[gclsoft]

If I set top 40, I want it is top 40 to the screen's top, instead of to the UINavigateController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    UITapGestureRecognizer *singleFingerTap =
    [[UITapGestureRecognizer alloc] initWithTarget:self
                                            action:@selector(handleSingleTap:)];
    [self.view addGestureRecognizer:singleFingerTap];

}

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    self.navigationController.navigationBarHidden = YES;
}

//The event handling method
- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer {
    //  CGPoint location = [recognizer locationInView:[recognizer.view superview]];
    self.navigationController.navigationBarHidden=!self.navigationController.navigationBarHidden;
}