... Adding a Tab Bar Item to a Tab Bar Application 147Try This: Creating a Tab Bar Application from Scratch 148Try This: Allowing Users to Customize a Tab Bar 151Summary 1569UINavigationBar and ... 138Summary 1408UITabBar and UITabBarController 141UITabBar, UITabBarController, UITabBarItem, and UITabBarControllerDelegate 142Try This: Using the Tab Bar Application Template 145Try This: Adding ... Programming: A Beginner’s Guide The Media layer is also rather low-level and contains C application programming interfaces (APIs) like OpenGL ES, Quartz, and Core Audio. The Cocoa layer overlays...