How to remove black space using Navigation Bar

Question

I am using Navigation controller.

In my first screen their is no need of NavigationBar . As this is the Home screen.So I am hiding it using this code:

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

When I push to new screen I am showing the NavigationBar using this code:

 - (void)viewWillAppear:(BOOL)animated
{
   [self.navigationController NO];
}

The problem is when I come back from other screens to my HomeScreen I am getting black screen in place of navigationBar.

Here is the problem in Image:

White color screen is my ViewController which has navigation bar and BLue one has'n Navigation bar. How can I remove the black part.

Answer 1

Click on the navigation controller and go to attribute inspector and uncheck the show navigation bar option as shown in the screenshot:

Answer 2

There is a better way to do it. All you need to do is create a subclass of UINavigationController class. Set the UINavigationControllerDelegate . Add the following method in the class.

    - (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if([viewController isKindOfClass: [SomeClass class]])
        [self setNavigationBarHidden: NO];
    else
        [self setNavigationBarHidden: YES];
}

OR

-(void)viewWillDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    [self.navigationController setNavigationBarHidden:NO animated:YES];
}
-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.navigationController setNavigationBarHidden:YES animated:YES];
}

Answer 3

试试这个

self.navigationItem.hidesBackButton = YES;