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iOS Objective-C Basics (Retired) Introduction to Objective-C Inheritance

Alex Lavender
Alex Lavender
2,471 Points

Any Idea what the solution is?

Can't figure this one out guys

Gem.h
@interface Gem : NSObject


@end
Ruby.h
@interface Ruby : Gem

@end
Bling.h
#import "Ruby.h"

@interface Bling : NSObject
@property (nonatomic) Ruby *Ruby;
@end
Alex Lavender
Alex Lavender
2,471 Points

Sorry the question is:

Finally, we have a class named 'Bling' which needs to have a property called 'ruby'. Switch over to 'Bling.h' and add a property named 'ruby' that belongs to the class 'Ruby'.

3 Answers

Tommy Choe
Tommy Choe
38,156 Points

Hey Alex,

you just need to change the property name from "Ruby" to "ruby" with a lower-case 'r'. The variable name should be different from the class name.

@property(nonatomic,strong) Ruby *ruby;

Hope that works for you!

Ryan Summe
Ryan Summe
4,618 Points

I don't think the name of the variable matters. However, you do need to use @class Ruby instead of #import. You do this when declaring a subclass as a property of another subclass.

Alex Lavender
Alex Lavender
2,471 Points

Came out with this code and it still doesnt work, any ideas?

@class Ruby

@interface Bling : NSObject

@property (nonatomic) Ruby *Ruby;

@end

Ryan Summe
Ryan Summe
4,618 Points

you need a ; , so @class Ruby;