In Chapter 5, you learned about UITabBarController and how it allows a user to access different screens. A tab bar controller is great for screens that are independent of each other, but what if you have screens that provide related information?
For example, the Settings application has multiple related screens of information: a list of settings (like Sounds), a detailed page for each setting, and a selection page for each detail (Figure 14.1). This type of interface is called a drill-down interface.
Figure 14.1 Drill-down interface in Settings