iPhone Programming: The Big Nerd Ranch Guide

7. View Controllers

View Controllers and XIB Files

In the Quiz application, you had one “screen,” one controller, and one XIB file:

Figure 7.1. Quiz, a single screen application

But what about applications with multiple “screens”? Typically, each screen gets its own controller and XIB file. Figure 7.2 shows an example application with two screens and the resulting controllers and XIB files.

Figure 7.2. Example of an application with two screens

Each controller has a view that gets placed on the window. (The view often has subviews like buttons ...