My app\'s (simplified) structure is this:
UITabBarController with one UINavigationController holding a UITableViewController as ro
UITabBarController
UINavigationController
UITableViewController
IF you can't select bottomlayoutguide bottom in your Xcode 7+
just do the following: open your storyboard in source code editor
search your controller's identifier
find , type , copy it id
search by id change attribute from top to bottom
enjoy.