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So you have this splitview but you don’t want to show it all the time in landscape, but Apple never explained how to do that. Let’s make up on that:

First add some button logic in the app delegate:

– (IBAction)toggleSplitView:(id)sender {

    if ( [window.subviews containsObject:splitViewController.view] ) {

        [splitViewController.view removeFromSuperview];

        splitViewController.viewControllers = [NSArray arrayWithObjects:leftViewController, leftViewController, nil]; 

        [window addSubview:rightViewController.view];

        [(UIBarButtonItem *)sender setTitle:@”Show Sidebar”];

    } else {

        [rightViewController.view removeFromSuperview];

        [rightViewController.view setTransform:CGAffineTransformIdentity];

        [navigationController popToRootViewControllerAnimated:NO]; // make sure we are on top

        [navigationController setViewControllers:[NSArray arrayWithObject: leftViewController]];

        splitViewController.viewControllers = [NSArray arrayWithObjects:navigationController, rightViewController, nil]; 

        [window addSubview:splitViewController.view];

        [rightViewController.view sizeToFit];

        [(UIBarButtonItem *)sender setTitle:@”Hide Sidebar”];

    }

}

In the controller that handles your right view (detail) add a item:

    UIBarItem *toggleSidebar;

@property (nonatomic, retain) IBOutlet UIBarItem *toggleSidebar;

Insert the control when the controller is triggered during hide and show:

– (void)splitViewController: (UISplitViewController*)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem {

    NSMutableArray *items = [[toolbar items] mutableCopy];

    [items removeObjectAtIndex:0];

    [items insertObject:toggleSidebar atIndex:0]; // add additional control for hiding

    [toolbar setItems:items animated:YES];

    [items release];

    self.popoverController = nil;

}

Add a button in the load view that triggers the AppDelegate:

    toggleSidebar = [[UIBarButtonItem alloc] initWithTitle:@”Hide sidebar”

                                                     style:UIBarButtonItemStyleBordered 

                                                    target: [self appDelegate]

                                                    action:@selector(toggleSplitView:)];

And don’t forget to put in in the toolbar 🙂

    [items insertObject:toggleSidebar atIndex:0];

// set the bar

    [toolbar setItems:items animated:YES];

Oh and hide it in the willHideController

Dealoc it when done:

– (void)dealloc {

    [popoverController release];

    [toolbar release];

    [toggleSidebar release];

    [super dealloc];

}