What is the subclass of Gem

maddy kramer. you just need to create a class called Ruby that is a subclass of Gem. here is a general form of doing that:

@interface Classname : Superclassname
@end

now the challenge says the class name is Ruby and its super class should be Gem

can you make it a bit more clear what your question is or what task you are having trouble with? looking at your current question you have a syntax error in your property and its also of the wrong type:

 @property (nonatomic, strong) Gem, ruby;

needs to be

@property (nonatomic, strong)  Ruby *ruby;

If you are curious about what class Gem is a subclass of... the answer lies in the header file. @interface Gem: xxxx this tells you what the class is inheriting from.

Now let's define a subclass of Gem named Ruby. Switch over to 'Ruby.h' and create a class named 'Ruby' which is a subclass of 'Gem'.

I'm trying to figure it out but I have no idea what is the answer!

Maddy

Follow the example of Gem... It is a subclass of NSObject. Notice how it is defined and follow that as a pattern. ;-)

Is this the answer? @interface Gem: NSObject @property (nonatomic, assign) NSNumber *Ruby; @end