iOS Programming View Controllers 视图控制器 1.1 A view controller is an instance of a subclass of UIViewController. 一个view controller 是一个UIViewController的子类. A view controller manages a view hierarchy. 一个view controller 管理一个视图树. It is responsible for c
iOS Programming View and View Hierarchy 视图和视图等级 1.1(1)File → New → Project.. From the iOS section, select Application, choose the Empty Application template, and click Next. 1.2 View Basics (1)A view is an instance of UIView or one of its subclasse