convert number to words ,in objective c

Question

I need to write numbers like: 1>yek

123>yeksad o bist o se

1,123>yek hezar o yeksad o bist o se

3,002,001>se milion o do hezar o yek ...

I

Answer 1

Swift version of @Vladimir answer (Just in case)

let formatter = NSNumberFormatter()
formatter.numberStyle = .SpellOutStyle
formatter.locale = NSLocale(localeIdentifier: "en_US")
let string = formatter.stringFromNumber(55015515)