Auto Layout and “Hide bottom bar when pushed”

Question

My app\'s (simplified) structure is this:

UITabBarController with one UINavigationController holding a UITableViewController as ro

Answer 1

-(void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    self.tabBarController.tabBar.hidden = NO;
    self.tabBarController.tabBar.alpha = 0.0;
    [UIView animateWithDuration:.3 animations:^{
        self.tabBarController.tabBar.alpha = 5.0;
    }];
}