Question

I am wondering why my UINavigationController is not letting me set a title. It lets me change the tint of the navigationBar, but the title and rightBarButtonItem I set just get ignored. Why?

Here’s my code:

  taps = 0;

  UIView*controllerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];

  controllerView.backgroundColor = [UIColor whiteColor];

  controller = [[UIViewController alloc] init];

  [controller setView:controllerView];

  [controllerView release];

  navController = [[UINavigationController alloc] initWithRootViewController:controller];

  navController.navigationBar.barStyle = 1;

  navController.navigationItem.title = @"Setup";

  UIBarButtonItem*item = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonSystemItemDone target:self action:@selector(dismissSetup:)];

  navController.navigationItem.rightBarButtonItem = item;

  [item release];

  [self presentModalViewController:navController animated:YES];

  [mp stop];

p.s: I know i’m not releasing some of the stuff I alloc’ed, I do that later!

Answer 1

The navigation controller updates the
middle of the navigation bar as
follows:
If the new top-level view controller has a custom title view,
the navigation bar displays that view
in place of the default title view.
To specify a custom title view, set
the titleView property of the view
controller’s navigation item.
If no custom title view is set, the navigation bar displays a
label containing the view
controller’s default title. The string
for this label is usually obtained
from the title property of the view
controller itself. If you want to
display a different title than the one
associated with the

view controller, set the title
property of the view controller’s
navigation item instead.

You want your UINavigationController to change its title depending on which viewcontroller is currently on top. So the way to go is to set the title in the viewcontrollers you are pushing onto the viewControllers array.

And by the way: I don’t think navigationcontrollers are supposed to be presented modally:

Because the UINavigationController
class inherits from the
UIViewController class, navigation
controllers have their own view that
is accessible through the view
property. When deploying a navigation
interface, you must install this view
as the root of whatever view hierarchy
you are creating. For example, if you
are deploying the navigation interface
by itself, you would make this view
the main subview of your window. To
install a navigation interface inside
a tab bar interface, you would install
the navigation controller’s view as
the root view of the appropriate tab.