RubyMotion

Separating Controllers with UITabBarController

UITabBarController functions an awful lot like UINavigationController. The children controllers’ views fit above the black tab bar, where each tab corresponds to one child. The Music app shows a tab with room for four controllers:

The fact that the More tab appears here indicates there are more than five children.

Unlike other containers, UITabBarControllers are only to be used as the rootViewController of a UIWindow. You cannot push an instance of UITabBarController in pushViewController:animated:. From a user-experience perspective, this means you should use a tab bar only if contains very distinct ...