"self.navigationItem.rightBarButtonItem" Not working

Question

I have the following code taken straight from the NavBar sample code from Apple. I put this in the viewDidLoad method for a view in my app that is being presented modally, and it wont work.

UIBarButtonItem *addButton = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"AddTitle", @"")
                                                               style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(addAction:)] autorelease];
self.navigationItem.rightBarButtonItem = addButton;

Any Suggestions?

Answer 1

Okay explained solution:

presentModalViewController:animated: presents a viewController modally, which does not have a UINavigationBar, so you can do some things:

1. Add a UINavigationBar in your viewController's nib and add the "Add" button there and everything you need to setup.
2. You can use pushViewController:animated: to show the viewController modally which will be on the navigation stack and have the UINavigationBar for you to add your button
3. If your first viewController is not a UINavigationController, using pushViewController:animated: won't solve it, so you can present a UINavigationController modally with your viewController as the rootViewController:

 YourViewController *viewController =[[[YourViewController alloc] initWithNibName:@"YourViewController" bundle:nil] autorelease];
    UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:viewController] autorelease];
    [self.navigationController presentModalViewController:navController animated:YES];

Hope any of this helps