Creates an immutable framesetter object from an attributed string.
- iOS 3.2+
- macOS 10.5+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Text
The attributed string with which to construct the framesetter object.
A reference to a CTFramesetter object if the call was successful; otherwise,
The resultant framesetter object can be used to create and fill text frames with the