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    <p>I had a similar issue, but I found this <a href="https://stackoverflow.com/questions/3377001/popovers-cannot-be-presented-from-a-view-which-does-not-have-a-window">post</a> that demonstrated the idea that you have to remove the leftBarButtonItem from the previous detailView before setting up the splitView's view controllers. This code fixed the issue for me.</p> <p>This is the code from that written by TPoschel.</p> <pre><code>- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Retrieve the new detail view controller UIViewController *detailViewController = [[self.allData objectAtIndex:indexPath.section] objectAtIndex:indexPath.row]; // Add the detail view controller to a navigation controller and set the bar style UINavigationController *detailNavigationController = [[UINavigationController alloc] initWithRootViewController:detailViewController]; detailNavigationController.navigationBar.barStyle = [[NSUserDefaults standardUserDefaults] integerForKey:@"UIBarStyle"]; // Retrieve previous detail view controller and remove the leftBarButtonItem UINavigationController *previousDetailNavigationController = [splitViewController.viewControllers objectAtIndex:1]; UIViewController *previousDetailViewController = [[previousDetailNavigationController viewControllers] lastObject]; previousDetailViewController.navigationItem.leftBarButtonItem = nil; // Update the split view controller's view controllers array. NSArray *viewControllers = [[NSArray alloc] initWithObjects:self.navigationController, detailNavigationController, nil]; splitViewController.viewControllers = viewControllers; [detailNavigationController release]; [viewControllers release]; // Dismiss the popover if it's present. if (popoverController != nil) { [popoverController dismissPopoverAnimated:YES]; } // This sets the left bar to nil when in landscape and equal to "Menu" when in portrait. // We need to remove rootPopoverButtonItem from the previous viewController... detailViewController.navigationItem.leftBarButtonItem = rootPopoverButtonItem; </code></pre> <p>} </p>
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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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