How to get last edit point of editing a UITextView?

I am trying to get the last editing point of a UITextView box.

I have tried getting the value textView.selectedRange.location,but it always comes开发者_如何学Python out as 2147483647 (which is -1).

When should I read this value

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You could save the selectedRange in the -textViewShouldEndEditing: method of your delegate, and then use this saved value.