Can i make a UIViewController ontop of a UIWindow

[r31shill]

I'm looking to create a UIViewController that will
present a UIView on top of the UIWindow.

This is to layer the visual of the application because in IB
once adding a UIToolBar it doesnt appear on the UIWindow.
So I'm thinking if I can, If possible, create a UIView ontop of the UIWindow
in hope that it would show the toolbar.

Or am i bonkers.

Any suggestions why the UIWindow isn't displaying the UIToolBar?

All help is appreciated.