Beginning iOS 5 Games Development: Using the iOS 5 SDK for iPad, iPhone, and iPod Touch

Working with the Power-Up Actor

In the previous section, we looked at the classes GameController and Actor and learned that the Actor class requires a Representation object to be displayed. The Representation protocol describes what is required of a class to manage the UIView associated with an actor. In this section, we will explore the class ImageRepresentation and see how it uses images to represent an actor. In the preceding chapter, we used images to draw different actors. In this section, we will show how we can combine those techniques into a simple, reusable class called ImageRepresentation.

To illustrate ImageRepresentation, in our first example we will create power-ups and animate them across the screen, as shown in Figure 6–1.