title: iPhone - Comparing strings with a German umlaut
body: <p>I've few German strings (with umlauts like åä etc) in NSArray.
  For example consider a word like "gënder" is there in array. 
  User enters "gen" in a text field.
  I can to check the words in string that matches the characters "gen".
  How can I compare the string by consider umlauts as english strings...?
  So in above example, when user enters "gen", it has to return "gënder".</p>
  
  <p>Is there any solution for this type of comparision?</p>