ios - In objective-c how to get characters after n-th? -

ios - In objective-c how to get characters after n-th? -

i have number represented string. longer 4 chars. need create new string 5th till end number.

for illustration if have 56789623, need have 9623 result (5678 | 9623).

how that?

p.s. suppose simple question, don't know how inquire google that.

nsstring *str = @"56789623"; nsstring *first, *second; if ([str length] > 4) { first = [str substringwithrange:nsmakerange(0, 4)]; sec = [str substringwithrange:nsmakerange(4, [str length] - 4)]; } else { first = str; sec = nil; }

ios objective-c