[self.tabBarController.tabBar setHidden:YES];

[self.window addSubview:self.tabBarController.view];

- (void)hideTabBar:(UITabBarController *) tabbarcontroller
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.5];

    for(UIView *view in tabbarcontroller.view.subviews)
    {
        if([view isKindOfClass:[UITabBar class]])
        {
            [view setFrame:CGRectMake(view.frame.origin.x, 480, view.frame.size.width, view.frame.size.height)];
        }
        else
        {
            [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 480)];
        }
    }

    [UIView commitAnimations];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    self.hidesBottomBarWhenPushed = YES;
}

- (void)hideTabBar{


    for (UIView *view in self.tabBarController.view.subviews) {

        if ([view isKindOfClass:[UITabBar class]]) {

            view.frame = CGRectMake(view.frame.origin.x,
                                    [UIScreen mainScreen].bounds.size.height,
                                    view.frame.size.width,
                                    view.frame.size.height);
        } else {

            view.frame = CGRectMake(view.frame.origin.x,
                                    view.frame.origin.y,
                                    view.frame.size.width,
                                    [UIScreen mainScreen].bounds.size.height);
        }
    }
}

- (void) showTabBar {


    for (UIView *view in self.tabBarController.view.subviews) {


        if ([view isKindOfClass:[UITabBar class]]) {

            view.frame = CGRectMake(view.frame.origin.x,
                                    [UIScreen mainScreen].bounds.size.height - 49,
                                    view.frame.size.width,
                                    view.frame.size.height);

        } else {

            view.frame = CGRectMake(view.frame.origin.x,
                                    view.frame.origin.y,
                                    view.frame.size.width,
                                    [UIScreen mainScreen].bounds.size.height - 49);
        }
    }
}