It depends on what the actual object is. CFTypeRef is the (void*) or (id) 
equivalent for CoreFoundation types, so if you know what it is, check its 
documentation for notifications or KVO options. If it's an immutable object 
(like a CFStringRef,NSString), the object's data will never change.
--
Gary L. Wade (Sent from my iPhone)
http://www.garywade.com/

> On Jan 11, 2016, at 10:18 AM, Dave <d...@looktowindward.com> wrote:
> 
> Any one have any other techniques for telling if a CFTypeRef has changed?

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