A reference to a CFString object.
- iOS 2.0+
- macOS 10.0+
- tvOS 9.0+
- watchOS 2.0+
CFString type refers to a CFString object, which “encapsulates” a Unicode string along with its length. CFString is an opaque type that defines the characteristics and behavior of CFString objects.
Values of type
CFString may refer to immutable or mutable strings, as CFMutableString objects respond to all functions intended for immutable CFString objects. Functions which accept
CFString values, and which need to hold on to the values immutably, should call
CFString (instead of
CFRetain) to do so.