“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

You need to use these lines of code on the page where you present the other view.

sceondController *obj=[[[sceondController alloc] initWithNibName:@"sceondController" bundle:nil] autorelease];
        UINavigationController *navController=[[[UINavigationController alloc] initWithRootViewController:obj] autorelease];

        [self.navigationController presentModalViewController:navController animated:NO];

and in second view use same code which you are using for making navigation button.

May be it resolves your problem.

Answer 2

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

Answer 3

Run your app in real device. In iOS6 it is not working on simulator.

Answer 4

I assume your view controller is actually a UINavigationController and everything else is in place. In which case I would change two things.

1. I wouldn't autorelease the UIBarButtonItem. That tends to be unreliable with view controllers so add the button to your list of things to dealloc at cleanup

2. I would use the setter function to set the button. Here is my code that works in my navigation controller

   clearAllButton = [[UIBarButtonItem alloc] initWithTitle:@"Clear All" style:UIBarButtonItemStylePlain target:self action:@selector(rightButtonPressed:)];

   [[self navigationItem] setRightBarButtonItem:clearAllButton];