Adds a value to a CFMutableSet object.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The set to modify.
A CFType object or a pointer value to add to
the(or the value itself, if it fits into the size of a pointer).
valueis retained by
theusing the retain callback provided when
thewas created. If
valueis not of the type expected by the retain callback, the behavior is undefined. If
valuealready exists in the collection, this function returns without doing anything.