CFDictionary structure containing a set of callbacks appropriate for use when the keys of a CFDictionary are all CFType-derived objects.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The retain callback is
CFRetain, the release callback is
CFRelease, the copy callback is
CFCopy, the equal callback is
CFEqual. Therefore, if you use a pointer to this constant when creating the dictionary, keys are automatically retained when added to the collection, and released when removed from the collection.