title: UIPopoverController Anchor Position
body: <p>I have a UIPopOverController for which the content controller is a UINavigationController.
  I'm resizing the popover size according to the content size of the controller pushed/popped into it. Initally i'm presenting the popover by using the method <code>presentPopoverFromRect:inView:permittedArrowDirections:animated:</code>. The anchor position is pointing at the center of the rect which i passed as an argument. If i push a controller(whose content size is small) into the navigationController , the popover shrinks from the bottom and moves above the rect which i mentioned earlier. </p>
  
  <p>I tried to present the popover everytime(for push/pop) , anchor position remains @ same point But the animation gets affected , doesnt looks good.</p>
  
  <p>what needs to be done to make the anchor position remains same irrespective of the change in popover size variation ?</p>