Out of bounds Problem with attributedSubstringFromRange

Question

I have a NSMutableAttributedString, I need to take substring from it.I use the following code to take substring,

startIndex and endIndex are two long variables.

Answer 1

This isn't how NSRange works. It is location (startIndex for you) and length. Hence the second goes from 10958 to 10958 + 12961 = 23919, which is out of bounds.