- iOS 7.0+
- macOS 10.11+
- tvOS 9.0+
The text storage object processing edits.
The types of edits done:
Storage Edited Attributes
NSText, or both.
Storage Edited Characters
The range in the final string that was explicitly edited.
The length delta for the editing changes.
The range of characters that changed as a result of attribute fixing. This invalidated range is either equal to
Layout managers must not change the contents of the text storage during the execution of this message.