title: UITextField's numerical pad: dot instead of comma for float values
body: <p>I'm using a textField which is filled from a numerical pad.</p>
  
  <p>Trouble is that, with lot of local region formats (all european, for example), UITextField's numerical pad has comma instead dot, so everytime I write a decimal number, UITextField can't recognise the decimal comma and it round number; for example 23,07 become 23.</p>
  
  <p>How can I solve this?
  I thought to set the textField fixed on USA; is it possible? How?</p>
  
  <p>I read the value using this:</p>
  
  <pre><code>var importo = (importoPrevistoTF.text as NSString).floatValue
  </code></pre>