title: Which view touch event will get called + iPhone
body: <p><strong>First Scenario</strong> :
  Suppose we have a first view as FirstView. in this view(FirstView) we add another view(SecondView) having exactly same frame as FirstView as</p>
  
  <pre><code>[FirstView addSubView:SecondView];
  </code></pre>
  
  <p>Now touch event of which view(FirstView or SecondView) will get called?</p>
  
  <p><strong>Second Scenario</strong> :</p>
  
  <p>suppose after adding SecondView(frame exactly same as FirstView) to FirstView I write 
  [FirstView:sendSubView];</p>
  
  <p>Now touch event of which view will get invoked?</p>