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copied!<p>First I voted up the previous answer, but then I noticed how ridiculously complex it is. It can and should be simplified.</p> <pre><code>- (void)applicationDidFinishLaunching:(UIApplication *)application { NSArray *initialViewControllers = [NSArray arrayWithArray:self.tabBarController.viewControllers]; NSArray *tabBarOrder = [[AppDelegate sharedSettingsService] tabBarOrder]; if (tabBarOrder) { NSMutableArray *newViewControllers = [NSMutableArray arrayWithCapacity:initialViewControllers.count]; for (NSNumber *tabBarNumber in tabBarOrder) { NSUInteger tabBarIndex = [tabBarNumber unsignedIntegerValue]; [newViewControllers addObject:[initialViewControllers objectAtIndex:tabBarIndex]]; } self.tabBarController.viewControllers = newViewControllers; } NSInteger tabBarSelectedIndex = [[AppDelegate sharedSettingsService] tabBarSelectedIndex]; if (NSIntegerMax == tabBarSelectedIndex) { self.tabBarController.selectedViewController = self.tabBarController.moreNavigationController; } else { self.tabBarController.selectedIndex = tabBarSelectedIndex; } /* Add the tab bar controller's current view as a subview of the window. */ [self.window addSubview:self.tabBarController.view]; } - (void)applicationWillTerminate:(UIApplication *)application { NSInteger tabBarSelectedIndex = self.tabBarController.selectedIndex; [[AppDelegate sharedSettingsService] setTabBarSelectedIndex:tabBarSelectedIndex]; [[NSUserDefaults standardUserDefaults] synchronize]; } - (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray *)viewControllers changed:(BOOL)changed { NSUInteger count = tabBarController.viewControllers.count; NSMutableArray *tabOrderArray = [[NSMutableArray alloc] initWithCapacity:count]; for (UIViewController *viewController in viewControllers) { NSInteger tag = viewController.tabBarItem.tag; [tabOrderArray addObject:[NSNumber numberWithInteger:tag]]; } [[AppDelegate sharedSettingsService] setTabBarOrder:[NSArray arrayWithArray:tabOrderArray]]; [tabOrderArray release]; } </code></pre> <p>All this happens in AppDelegate. You set UITabBarController's delegate to AppDelegate instance in Interface Builder. sharedSettingsService is what persists the data for me. Basically it can be a NSUserDefaults front-end or anything you like (CoreData for example). So everything is simple, Interface Builder helps here, not makes things more complex.</p>

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