Hiding business logic from View Layer

example.m

// Something that can be drawn
@protocol DrawablePerson
@property(nonatomic, copy) NSString * name;
@property(nonatomic, copy) NSString * followingStatus;
@end

@interface Person : NSObject <DrawablePerson>
@property(nonatomic, copy) NSString * name;
@property(nonatomic, copy) NSString * followingStatus;
@end

@interface PersonView : UIView
// Even if person have some businnes logic in it,
// View layer shouldn't care about it
// It only should care about how to draw it correctly
@property(nonatomic, strong) id<DrawablePerson> person
@end