title: Moving UIView up when keyboard shown
body: <p>I know this a frequent question but ive had no luck implementing this from examples i have found. i could be doing something simple wrong..(lets hope so). i am trying to move the UIview up as a have a textfield hidden at the bottom.</p>
  
  <p>A little about my app, its got a tab bar controller and implements a standard UIView. When i add the code to move the display up nothing happens. Do i need to have a scroll view for this to work, is it a conflict with tab controller or am i doing something else wrong? thanks</p>
  
  <p>Dan</p>