Replace multiple characters in a string in Objective-C?

In PHP I can do this:

$new = str_replace(array('/', ':', '.'), '', $new);

How to replace the string values stored with in a variable in objective c

I got an xml in output for the webservices.I have the result in the variable and i stored the result in that variable.Now i want to replace the strings in that variable.How to replace the strings in that variable. For ex: