I have UITableViewwith cells that execute segue for another simple verbose view. UITableViewand a detailed view is built into the navigation controller.
In mine, UITableViewI put in this study guide UISearchController:
http://www.jhof.me/simple-uisearchcontroller-implementation/
So now I have the following graphical problem: When I perform a session by clicking on a cell after doing the research, I come to my detailed view. But when I click the back button in the navigation bar, a mysterious black bar appears just above the TabBar. When the animation is over, the black bar disappears.

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, TabBar.
?
EDIT:
, TabBarController, , . , . ...