How to add a global right bar button (UINavigationController) in Three20's AppDelegate

I want to add a global right bar button in the global AppDelegate so all my view controllers will have this button automatically.

I added in the AppDelegate

navigator.window.rootViewController.navigationController.navigationItem.rightBarButtonItem     
= [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Test", @"") 
style:UIBarButtonItemStyleBordered target:self action:@selector(showTest)] autorelease];

Of course the above code is not working..any problem with the code above?

Solution

Well, I'm not sure you can do it in your way, because UINavigatorController always uses the buttons from the view controller that is currently displayed, and not from the top / root controller.

What you can do is to subclass TTViewController with a new view controller and set your left bar button item.

///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
@implementation BaseViewController


///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark UIViewController



///////////////////////////////////////////////////////////////////////////////////////////////////
- (void)viewDidLoad {
  [super viewDidLoad];


  self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Test", @"") 
                                                                            style:UIBarButtonItemStyleBordered target:self action:@selector(showTest)] autorelease];
}

and then you should extend all your view controllers from this base controller, which contains the right navigation bar item