Question

I’ve got an NSTextView and I get the -textDidChange: notification. From that, I can get the current string value of the whole textview, but I can’t figure out how to tell what’s been deleted and added.

For example, if the string in the text view was This is a string and the user deleted the g, how can I be made aware of that change?

Is there a way to achieve this, preferably without subclassing?

Answer 1

There are several delegate methods that should do what you are looking for:

– textView:shouldChangeTextInRange:replacementString:
– textView:shouldChangeTextInRanges:replacementStrings:
– textView:shouldChangeTypingAttributes:toAttributes:
– textViewDidChangeTypingAttributes: