Re: C struct and __unsafe_unretained
Re: C struct and __unsafe_unretained
- Subject: Re: C struct and __unsafe_unretained
- From: Jeff Kelley <email@hidden>
- Date: Sun, 30 Oct 2011 13:40:46 -0400
The recommendation is to replace the struct with a class. So you would replace x with a class that might look like this:
> @interface ReplaceX : NSObject
>
> @property (copy) NSString *label;
> @property int value;
>
> @end
This aside, you should be OK using __unsafe_unretained in an App Store application as long as you’re only using constant strings (which won’t be released).
Jeff Kelley
On Oct 30, 2011, at 1:32 PM, 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.
>
> 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?
>
> 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?
>
> 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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