NSParagraphStyle class and its subclass
NSMutableParagraphStyle encapsulate the paragraph or ruler attributes used by the
NSAttributedString classes. Instances of these classes are often referred to as paragraph style objects or, when no confusion will result, paragraph styles.
- iOS 6.0+
- macOS 10.0+
- tvOS 6.0+
- watchOS 2.0+
The mutable subclass of