iPhone apps, as you know, have limited screen real estate when compared to their desktop counterparts. Even iPad apps have a small screen compared to most desktop applications. It’s almost inevitable that an app you want to write will need to have multiple screens. When Apple developed the iPhone, they came up with two solutions for managing multiple screens: the navigation bar
and the tab bar
. Examples of both are shown in the following:
Navigation bars are used for hierarchical content. Tab bars are used for separating very different screenfuls of content.
• Navigation bars:The navigation bar, casually known as the ...