On Oct 30, 2011, at 10:32 AM, James Merkel wrote:
> The document on ARC talks about problematic C structs like:
>
> struct x { NSString *S; int X; } StaticArray[] = {
> @"foo", 42,
> @"bar, 97,
> ...
> };
>
> I use that pattern quite a bit in my code and haven't had any problems with
> it. These are basically constant strings that never change.
Is the above pattern in your code used with globals? (Probably.)
> With ARC, the compiler wants me to change the code to:
>
> struct x { __unsafe_unretained NSString *S; int X; }
>
> Aside from this looking really ugly, will the App store accept this in an
> application?
Yes. "__unsafe_unretained" is public API, therefore the App store will accept
it.
> The document on ARC says in order to do this task correctly, the code should
> be changed to a class. Ok, what class are they talking about?
That depends on the scenario. If the above struct is simply a global (and it
probably is), then changing to a class would be more complicated than just
using __unsafe_unretained. If the above struct is stored in malloc()ed memory,
then switching to a class is the right thing to do.
davez
> I don't see how the collection classes like NSDictionary or NSArray support
> this. Do they mean create your own collection class to do this?
>
> Thanks for any insight on this.
>
> Jim Merkel
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