title: Is there a simple way to format currency into string in iOS?
body: <p>I need a way to format the price from NSNumber into a string like this:
  "USD 0.99", not "$ 0.99".</p>
  
  <p>My game uses custom fonts, and they could not have the symbols for all the available App Store currencies like GBP. So I think it's better to roll-back to string representation of currency. </p>
  
  <p>The method used should be absolutely OK for any currency that App Store supports.</p>