osx - NSTextView: Get text changes (insertions and deletions) -


i've got nstextview , -textdidchange: notification. that, can current string value of whole textview, can't figure out how tell what's been deleted , added.

for example, if string in text view this string , user deleted g, how can made aware of change?

is there way achieve this, preferably without subclassing?

there several delegate methods should looking for:

– textview:shouldchangetextinrange:replacementstring: – textview:shouldchangetextinranges:replacementstrings: – textview:shouldchangetypingattributes:toattributes: – textviewdidchangetypingattributes:

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