gistfile1.m

@implementation HideTabBar

+ (void)tabBarHidden:(BOOL)hide tabBar:(UITabBarController *)tabBarController {
    CGFloat viewHeight = [self viewHeight:hide];
    for (UIView *view in tabBarController.view.subviews) {
        CGRect _rect = view.frame;
        if ([view isKindOfClass:[UITabBar class]]) {
            _rect.origin.y = viewHeight;
        } else {
            _rect.size.height = viewHeight;
        }
        [view setFrame:_rect];
    }
}

+ (CGFloat)viewHeight:(BOOL)b {
    return ([[UIScreen mainScreen] bounds].size.height - ((b) ? 0 : 49));
}

@end