Problem: XCode 4.1 and strong modifier


I reached chapter 19 using XCode 4.1 but now i get the error „Unknown property attribute ‘strong’.
Isn’ t that right, that the book is based on XCode 4.1 and people have problems using 4.2?

I`m confused. Is there a need to update to 4.2 after chapter 19?

Thanks in advance.


You should try to update, I’m using Xcode 4.2 and got no problems with the strong modifier


Somewhere they said, that it’s better to use 4.1 for going through the book.
When is it safe to update to 4.2?

Thanks in advance.


I don’t recall seeing anything to that effect. The book was explicitly written for 4.2; there’s no bad time to upgrade.