title: UITextField set placeholder color
body: <p>I've been mocking about on the internet for a while and found this bit of code: </p>
  
  <pre><code>.h
  IBOutlet UITextField *TextField;
  
  .m
  [TextField setValue:[UIColor lightGrayColor]
                                    forKeyPath:@"_placeholderLabel.textColor"];
  </code></pre>
  
  <p>It's not working I'm using IOS 6.1 Running in the Simulator. 
  Is it because I haven't subclassed the given UITextField?</p>
  
  <p>Regards,
  Daniel</p>