ViewController between TabBarController and SplitViewController

Hi everybody,
I’m trying to place a viewController between a tabBarController and a splitViewController.
Is it possible?
It seems to work but not at all: when I click on the button that send me (whit a show action) into the splitViewController I don’t see anymore my tabBar.
I tried to embed my new viewController in a NavigationController but, as i suspect my application crash because inside the splitViewController already exist a navigationController.
Thank u in advance