NavigationController

The nearest ancestor in the view controller hierarchy that is a navigation controller.

Declaration

var navigationController: UINavigationController? { get }

사이드 메뉴를 만들기 위해서 사용

SideMenu

https://www.youtube.com/watch?v=K89-RLzYxQM

라이브러리

https://github.com/jonkykong/SideMenu