Finding extension of an URL

Question

i have a string named url i.e

NSString *url = @"http://sound17.mp3pk.com/indian/barfi/%5BSongs.PK%5D%20
                  Barfi%20-%2001%20-%20Barfi!.mp3";

Now I want that It should search from last upto the .(dot)

i.e it should search mp3 in string as it is coming after .(dot) and want to store that mp3 in the temporary variable. how can i use lastindex(".") or something else to store in temporary variable.

Answer 1

Simple as that:

NSString *extension = [url pathExtension];