title: Setting a UITextField into editing mode programmatically
body: <p>I have a <code>UITextField</code> that I want to set into editing mode (keyboard on screen and cursor in text field box) programatically.  I know that the user will be in editing mode when this view appears onscreen, so I want to save the user from having to tap the text field.  </p>
  
  <p>The "editing" property of a <code>UITextField</code> is read only - so that doesn't work.  Is there a way to set the <code>UITextField</code> into editing mode, with a keyboard onscreen, programmatically?  </p>