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    <p>The -viewWillDisappear: method is not the best place for modifying the view controller stack for your navigationController because it is triggered both when you switch tabs and when a view is pushed on top of it.</p> <p>I played around with this a bit and found that the best place for this is in the -[UITabBarControllerDelegate tabBarController:didSelectViewController:] method. So, first you need to designate an object to be the delegate for your tab bar (I used the app delegate). Bind the delegate property of your UITabBarController to an object implementing the UITabBarControllerDelegate protocol in code or in Interface Builder.</p> <p>Then, implement the -tabBarController:didSelectViewController: method. The trick now is how to tell when your "address book" tab is being switched to. I kept track of the view controller for the tab in question using a property of type UINavigationController (the root view controller for the tab). After binding the tab1NavController property to the actual instance using Interface Builder, it can be used to compare to the viewController parameter to see what tab was just selected.</p> <pre><code>@interface Pop2RootTabSwitchAppDelegate : NSObject &lt;UIApplicationDelegate, UITabBarControllerDelegate&gt; { UINavigationController *tab1NavController; } @property (nonatomic, retain) IBOutlet UINavigationController *tab1NavController; @end @implementation Pop2RootTabSwitchAppDelegate - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { NSLog(@"[%@ tabBarController:%@ didSelectViewController:%@]", [self class], tabBarController, viewController); if (viewController == tab1NavController) { NSLog(@"viewController == tab1NavController"); [tab1NavController popToRootViewControllerAnimated:NO]; } } </code></pre>
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    1. COThat's the winner... thanks! (I had been focused on cleaning state on exit and never considered setting state on enter.)
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    2. COwhen i try this i get an error if I set animated to NO.. I have to set to YES which makes it a bit clunky. "-[DetailViewController tableView:cellForRowAtIndexPath:]: message sent to deallocated instance" ........ any ideas?
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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