To see the real power of UINavigationController, you need another UIViewController to put on the navigation controller’s stack. Create a new Objective-C class (File → New → New File...). Name this class DetailViewController and choose UIViewController as the superclass. Check the box With XIB for user interface (Figure 11.6).
Figure 11.6 View controller with XIB subclass
In DetailViewController.m, delete all of the code between the @implementation and @end directives so that the file looks like this:
#import "DetailViewController.h" @implementation DetailViewController ...