Re: How do I temporary retain self, under ARC?
Re: How do I temporary retain self, under ARC?
- Subject: Re: How do I temporary retain self, under ARC?
- From: Gerd Knops <email@hidden>
- Date: Fri, 18 Jul 2014 08:41:16 -0500
That's similar to what I have used. Initially it started out simply as
id keepAlive=self;
...
keepAlive=nil;
but a few Xcode versions ago the static analyzer started complaining that it wasn't really doing anything. So that last line became
if(keepAlive) { keepAlive=nil; }
which shut up the analyzer. [keepAlive self]; like Andy suggests would probably work just as well, though probably a tad more expensive as a method call is involved.
Gerd
On Jul 17, 2014, at 11:23 PM, Andy Lee <email@hidden> wrote:
> On Jul 17, 2014, at 11:01 PM, Jens Alfke <email@hidden> wrote:
>> Once I’ve identified such a bug, the fix is easy: put a [[self retain] autorelease] at the top of the method. Except now I’m using ARC, and I can’t find a simple way of doing it. I tried adding
>> __unused id retainedSelf = self;
>> but the optimizer recognizes that retainedSelf isn’t used and strips it out, making this a no-op. The only thing I’ve found that works is
>> CFRetain((__bridge CFTypeRef)self);
>> at the top of the method, and a corresponding CFRelease at the end, but this is pretty ugly and could cause leaks if the method returns early.
>
> How about
>
> id retainedSelf = self;
>
> at the beginning and
>
> [retainedSelf self];
>
> at the end?
>
> --Andy
>
>
> _______________________________________________
>
> Cocoa-dev mailing list (email@hidden)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden