Navigation bar doesn't show up

Question

I have this problem: i have a view controller (embedded in a navigation controller) that after doing an action triggers a manual segue pushing a new view controller, however in the new view controller there is no navigation bar because in the first controller i had implemented the viewWillDisappear method like this:

StartViewController

- (void)viewWillDisappear:(BOOL)animated {
  // Hide the navigation bar just before the view disappear
  [[self navigationController] setNavigationBarHidden:YES animated:YES];
}

Here is the code for the manual segue that's inside an IBAction:

[self performSegueWithIdentifier:@"tutorialSegue" sender:self];

DestinationViewController

I'd tried like this

- (void)viewDidLoad
{
    [super viewDidLoad];
// Do any additional setup after loading the view.
    [[self navigationController] setNavigationBarHidden:NO animated:NO];
}

but it doesn't work, actually in the debugger i noticed navigationcontroller is equal to nil and i just can't figured out why.

Answer 1

If you want StartViewController to hide navigation bar, and DestinationViewController to show it: Add corresponding code to -(void)viewWillAppear: method.

StartViewController:

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

DestinationViewController:

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

If you want both view controllers to have navigation bar, just remove all lines that contain setNavigationBarHidden: