NSPositional specify an insertion point in a container relative to another object in the container, for example,
before first word or
after paragraph 4. The container is specified by an instance of
NSPositional objects commonly encapsulate object specifiers used as arguments to the
move commands and indicate where the created or moved object is to be inserted relative to the object represented by an object specifier.
- macOS 10.0+
Invoking an accessor method to obtain information about an instance of
NSPositional causes the object to be evaluated if it hasn’t been already.
You don’t normally subclass