How to remove black space using Navigation Bar - ios

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

try this one
self.navigationItem.hidesBackButton = YES;

Answer 3

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];
}