YALFoldingTabBar is a subclass of a standard UIView. We wanted to make this component expand and contract in response to a user tapping. When the component is closed you can only see a central button (“+”). When tapping on it, our custom Tab Bar expands letting other tabBarItems appear, so that the user can switch the controllers. YALFoldingTabBarController is a subclass of UITabBarController with custom animating YALFoldingTabBar. Each separate tabBarItem can have two additional buttons on...