ipad - UISplitViewController strange behaviour of Master split

Question

I'm developing UISplitViewController application, Master view is embedded into Navigation Controller.

Every time I segue in Master to a new GroupsViewController and then press "back" button, my GroupsViewController moves to the center of screen and the whole SplitViewController covers it vertically from top:

It happens only in landscape orientation. In portrait everything works fine.

The segue is from NavigationBarButton to a GroupsViewController

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"ShowGroupsSegue"])
    {
        GroupsViewController *groupsController = (GroupsViewController *)[segue destinationViewController];
        groupsController.contactsdelegate = self;
    }
}

Any suggestions how can I fix that?

Answer 1

I got it working by making sure that relevant class was returning YES in (BOOL)shouldAutorotateToInterfaceOrientation for all orientations on iPad.

I have a universal project, so that particular class was still set to the appropriate iPhone settings (return YES only to UIInterfaceOrientationPortrait).