Re: Who owns a child view controller?
Re: Who owns a child view controller?
- Subject: Re: Who owns a child view controller?
- From: Charles Srstka <email@hidden>
- Date: Wed, 12 Jul 2017 12:38:17 -0500
> On Jul 12, 2017, at 12:23 PM, Jens Alfke <email@hidden> wrote:
>
>
>> On Jul 12, 2017, at 9:54 AM, Jeremy Hughes <email@hidden>
>> wrote:
>>
>> I’d forgotten about autorelease pools - but I guess they’re still there in
>> Cocoa for backwards compatibility with pre-ARC code.
>
> Autorelease is still necessary with ARC. There are cases where ARC doesn’t
> know enough about object lifetimes at compile-time, and has to e.g.
> autorelease a temporary object before returning it from a method.
While that’s true, the main reason, as I understand it, that ARC doesn’t know
enough about the object’s lifetime is that non-ARC code may be calling the
method. In an all-ARC world, a method could always just return objects with a
+1 retain count, and the consumer could just assume that and always balance the
retain.
Charles
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