title: How to lay a view above all of every tabbar view
body: <p>I have 2 questions:</p>
  
  <p>The 1st one is:
  I want to put a view that contain many buttons above the tab bar view. Even if I switch to whatever tab, I want to see that view. How is it possible?</p>
  
  <p>The 2nd:
  Can I handle the event when i click to the button inside that view? How to get that?</p>
  
  <p>Any suggestion is welcome. Thanks.</p>