Re: With What does Apple Swizzle the IsA-pointer in KVO?
Re: With What does Apple Swizzle the IsA-pointer in KVO?
- Subject: Re: With What does Apple Swizzle the IsA-pointer in KVO?
- From: "Clark Cox" <email@hidden>
- Date: Fri, 23 Nov 2007 06:54:02 -0800
On Nov 23, 2007 5:42 AM, Philip Mötteli <email@hidden> wrote:
> Hi,
>
>
> Apple says, that it uses IsA-swizzling as the underlying technology to
> implement KVO.
> What are/is the class(es), which replace the original class of the
> observed object? Is it an NSProxy subclass? Different NSProxy
> subclasses, depending on the observed object? Is it a direct subclass
> of the observed object?
Any or none of the above. It's an implementation detail, and really
shouldn't be relied upon. Perhaps I could provide more help if you
stated why it is that you think that you need to know this.
--
Clark S. Cox III
email@hidden
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