Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Shaun Kelly
Shaun Kelly
5,648 Points
Posted by Shaun Kelly
Shaun Kelly
5,648 Points

Need help on challenge 3!?

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'.

There is an error at thats... The 'ruby' property should be a pointer. Heres my code below.

Gem.h 
@interface Gem : NSObject
@end
Ruby.h 
@interface Ruby : Gem
@end
Bling.h 
@interface Bling : NSObject
@property (nonatomic) Ruby ruby;
@end

2 Answers

William Li
PLUS
William Li
Courses Plus Student 26,868 Points
William Li
William Li
Courses Plus Student 26,868 Points

Pretty closed, only missed the strong keyword, and the * here.

@interface Bling : NSObject
@property (nonatomic, strong) Ruby *ruby;
@end