title: how to open different view controllers on app launch in iphone app?
body: <p>I have two views - view1 and view2. 
  View1 is my default viewcontroller loaded from mainwindow.xib.
  Depending on some condition checking, i want to load either View1 or View2, say if user registration is not done, load sign up screen for user, else go to default view controller.</p>
  
  <p>How and where do I check this condition? </p>
  
  <p>Please help.</p>
  
  <p>Thanks in advance.</p>