kCTFontSlantTrait
The normalized slant angle from the font traits dictionary.
Declaration
let kCTFontSlantTrait: CFStringDiscussion
The value returned is a CFNumber object representing a float value between -1.0 and 1.0 for normalized slant angle. The value of 0.0 corresponds to 0 degrees clockwise rotation from the vertical and 1.0 corresponds to 30 degrees clockwise rotation.