Я прошу
[self presentModalViewController:searchRegionController animated:YES];
после этого я пытаюсь добавить NavigationController с помощью
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Add" style:UIBarButtonItemStyleBordered target:self action:@selector(next:)] autorelease];
self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelAdd:)] autorelease]
self.navigationItem.titleView = someView;