View Controllers - iOS Programming: The Big Nerd Ranch Guide - page 222

@interface HypnosisViewController : NSObject
@interface HypnosisViewController : UIViewController
@end
A view controller is responsible for creating its view hierarchy. HypnosisViewCon-
troller 's view hierarchy will be made up of only one view, an instance of Hypnos-
isView - the UIView subclass you created in Chapter 6 . Locate HypnosisView.h
and HypnosisView.m in Finder and drag them into HypnoTime 's project navigator.
In the sheet that appears, check the box to Copy items into destination group's folder and
click Finish ( Figure 7.3 ). This will create a copy of the two files, add those files to Hyp-
noTime 's directory on the filesystem, and then add them to the HypnoTime project.
Figure 7.3 Adding HypnosisView to HypnoTime
A UIViewController subclass creates its view hierarchy by overriding the method
loadView . This method creates a view instance and sets it as the view of the view con-
troller. In HypnosisViewController.m , override loadView , making sure to im-
port the header file for HypnosisView at the top of this file.