On Jan 31, 2013, at 9:46 PM, Quincey Morris 
<quinceymor...@rivergatesoftware.com> wrote:

> On Jan 31, 2013, at 21:08 , Kyle Sluder <k...@ksluder.com> wrote:
> 
>> But CFTypes *are* NSObjects.
> 
> Only if they're toll-free bridged,

All CFTypes are toll-free bridges to NSObject. (I was surprised when I learned 
this, and I don't know how far back this holds true.)


> and even then they'll need to conform to NSCoding if they're going to 
> encode/decode automatically.

This is certainly true.

> The non-toll-free-bridged ones are memory-managed objects, but not 
> necessarily ObjC objects. GCD objects would be a prime example of this.

GCD objects and XPC objects are NSObjects as of 10.8.

--Kyle Sluder
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