Re: Avoiding KVO in dealloc?
Re: Avoiding KVO in dealloc?
- Subject: Re: Avoiding KVO in dealloc?
- From: Kyle Sluder <email@hidden>
- Date: Mon, 3 Aug 2009 17:59:01 -0700
On Mon, Aug 3, 2009 at 5:47 PM, Kiel Gillard<email@hidden> wrote:
> Do you have a documentation reference for that? I would have expected the
> isa swizzling to be an implementation detail of the runtime that is handled
> before my subclass inits. Of course, what I expect and what happens in
> reality do not always match ;-)
The Objective-C 2.0 Programming Guide prescribes the use of direct
ivar access inside an initializer[1] and inside dealloc[2].
As far as your point about when swizzling occurs, it can only happen
at the point of a KVO observer registration: the runtime can't predict
the future.
--Kyle Sluder
[1] http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocAllocInit.html#//apple_ref/doc/uid/TP30001163-CH22-SW14
[2] http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocProperties.html#//apple_ref/doc/uid/TP30001163-CH17-SW16
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