Create Your Characters: Game Engine, Image Actors, and Behaviors - Beginning iOS6 Games Development - page 127

to create and update an actor's UIView . The protocol Behavior describes a task to be implemented
by any class that wishes to create a shared, reusable behavior. These classes and protocols are
covered in detail in the following sections.
The GameController Class
The GameController class coordinates the actors in the game and is ultimately responsible for
rendering each actor on the screen. This includes setting up GameController as a UIViewController ,
defining a way to call our updateScene task repeated with a CADisplayLink , and finally reviewing
how updateScene manages the actors in the scene. GameController also provides a mechanism for
adding and removing actors. Let's take a look at the header for the class GameController , shown in
GameController.h
IBOutlet UIView* actorsView;
CADisplayLink* displayLink;
NSMutableSet* actors;
NSMutableDictionary* actorClassToActorSet;
NSMutableSet* actorsToBeAdded;
NSMutableSet* actorsToBeRemoved;
BOOL workComplete;
}
@property (nonatomic) long stepNumber;
@property (nonatomic) CGSize gameAreaSize;
@property (nonatomic) BOOL isSetup;
@property (nonatomic, strong) NSMutableArray* sortedActorClasses;
-(BOOL)doSetup;
-(void)displayLinkCalled;
-(void)updateScene;
-(void)removeActor:(Actor*)actor;
-(void)addActor:(Actor*)actor;
-(void)updateViewForActor:(Actor*)actor;
-(void)doAddActors;
-(void)doRemoveActors;
-(NSMutableSet*)actorsOfType:(Class)class;
@end