Question

I presented a View using a call to presentModalViewController.

My new View didn’t have a navigation bar, so I added one from the Library but now when I created a UIBarButtonItem in viewDidLoad of my controller, and set it to rightBarButtonItem of the navigationBarItem.

But when I run my app, the Navigation bar is there but there is no button.

Did I miss a step or something ?

Answer 1

Just adding a navigation bar manually will not make the self.navigationController property actual and it’s value is nil, which, I believe, you’re using for adding a UIBarButtonItem instance.

What I’d recommend is to declare a UINavigationBar IBOutlet in your controller, connect it in NIB editor with navigation bar you’ve added and after that in viewDidLoad use something like:

@interface ...
@property (nonatomic, retain) IBOutlet UINavigationBar *theBar;
@end

@implementation ...
@synthesize theBar;

-(void)viewDidLoad {
  [super viewDidLoad];

  UIBarButtonItem *yourButton = ...;

  UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:@"MyTitle"];
  item.rightBarButtonItem = yourButton;

  [theBar pushNavigationItem: item animated:NO];
  [item release];

  ...
}

@end