2017-05-29 View Controller apple開発 View Controller の役割 https://developer.apple.com/jp/documentation/featuredarticles/ViewControllerPGforiPhoneOS/AboutViewControllers/AboutViewControllers.html#//apple_ref/doc/uid/TP40007457-CH2-SW1 iOS アプリの画面開発の基礎を理解する - A Day In The Life