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    <p>I tried to create an iphone application with UITabBarController and some UINavigationController inside it and faced the same problems as "mamcx". With your example-code i get it to run :) Thanks a lot.</p> <p>Here is how it works for me.</p> <pre><code>// YOURS fourthNavigation = [[UINavigationController alloc ] init ]; fourthViewController = [[[FourthTabRootController alloc] initWithNibName:@"FourthView" bundle:nil] autorelease]; fourthNavigation.tabBarItem.title = @"YOURS"; fourthNavigation.viewControllers = [NSArray arrayWithObjects:fourthViewController, nil]; // Add self-defined UIViewControllers to the tab bar tabBarController.viewControllers = [NSArray arrayWithObjects:firstNavigation,secondNavigation, thirdNavigation, fourthNavigation, nil]; // Add the tab bar controller's current view as a subview of the window [window addSubview:tabBarController.view]; </code></pre> <p>The other UINavigationControllers "firstNavigation, ... " are created the same way. I load the view elements from nib-files that are connected to my subclassed UIViewController classes. You dont need to add a NavigationBar in the IB to your view, cause the UINavigationController has allready one. So you only need to set the title in "initWithNibName"</p> <pre><code> // The designated initializer. Override to perform setup that is required before the view is loaded. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { // Custom initialization self.title = @"YOURS"; } return self; } </code></pre> <p>I hope that helps.</p>
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