UINavigationBar - 숨기기

<네비게이션바 숨기기>

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

// or
 
- (void)viewDidDisappear:(BOOL)animated
{
    [self navigationController].navigationBarHidden = YES;
}