title: make UItextfield to function like UISearchBar
body: <p>I want to change the looks of <code>UISearchBar</code>: So,</p>
  
  <p>If there's a way by which I can make my  <code>UITextField</code>(in a custom background for search) to function like <code>UISearchBar</code> ? or subclassing and overriding the <code>- (void)layoutSubviews</code> is the only way ? </p>
  
  <p>Kindly tell How to subclass it !!!</p>