Returns the typesetter object being used by the framesetter.
- iOS 3.2+
- macOS 10.5+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Text
The framesetter from which a typesetter is requested.
A reference to a CTTypesetter object if the call was successful; otherwise,
NULL. The framesetter maintains a reference to the returned object, which should not be released by the caller.
Each framesetter uses a typesetter internally to perform line breaking and other contextual analysis based on the characters in a string; this function returns the typesetter being used by a particular framesetter in case the caller would like to perform other operations on that typesetter.