How to find caret position in an NSTextView?

Question

I've an NSTextView with with several semi-colon separated strings. I need to find on which of those strings the caret has been placed. How could I do that?

Answer 1

NSInteger insertionPoint = [[[myTextView selectedRanges] objectAtIndex:0] rangeValue].location;

Answer 2

对于Swift 4

let insertionPointIndex = myTextView.selectedRanges.first?.rangeValue.location