self.tabBar.hidden = YES;

self.view.backgroundColor = [UIColor blueColor];

#pragma mark - Overriden UIViewController methods
- (BOOL)hidesBottomBarWhenPushed {
    return YES;
}

override var hidesBottomBarWhenPushed: Bool {
    get { return true }
    set { super.hidesBottomBarWhenPushed = newValue }
}

class FooTabBar: UITabBarController {
  override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    self.tabBar.isHidden = true
  }
}