Question

Im am trying to figure out how to have a consistent TabBar throughout the life of application. To explain, I have MyAppDelegate with its main window, then a UITabBarController with a TabBarView set to the window. Now I want to display menus, tables, images, etc; switching views in the main view, while the TabBar stays on top of it all throughout (ie switching views) and ultimately have the TabBar and its items act like an interrupt, so once touched the program will automatically stop what it was doing and display the “touched” TabBar view.

Thank you

Answer 1

What you are describing is exactly the behavior that UITabBarController gives you. Well, almost. It is up to you to make any long-running code “stop what it was doing” when the tab bar switches tabs. You can set one of your classes to be the UITabBarController’s delegate and track the changes from tab to tab:

delegate The tab bar controller’s
delegate object.

@property(nonatomic, assign)
id
delegate Discussion You can use the
delegate object to track changes to
the items in the tab bar and to
monitor the selection of tabs. The
delegate object you provide should
conform to the
UITabBarControllerDelegate protocol.
The default value for this property is
nil.