iOS - UISearchController处于活动状态时显示的导航栏

I programatically created a UISearchController and added it to my UIView A. I also have a UITableView in the same UIView. I use UISearchController to search through my UITableView. When you click on a cell, UIView B gets pushed. Both UIView A and UIView B have UINavigationBar set to HIDDEN. When I simply click on a UITableViewCell WITHOUT searching, everything happens perfectly, and UIView B is displayed without UINavigationBar.I programatically created a UISearchController