title: iPhone: Pushing View Controller causes Slow and Jerky Keyboard Animation
body: <p>I have a model-view-controller design app with more than 20 views and imageviews. </p>
  
  <p>In one view, I have a textfield that gets set to first responder when the view displays such that the keyboard is immediately visible. When I push this view onto the navigation controller the display of the keyboard is very slow and jerky. However, when  I pop the view, the retraction of the keyboard is fast and smooth.  </p>
  
  <p>What could cause the slow and jerky animation when pushing the view? I really have to have the keyboard visible when the view loads. </p>