title: Showing a overlaying menu when tab bar item is clicked - IOS
body: <p>Thanks for reading my question!</p>
  
  <p>I have a 5-part tabbar which I use for app navigation, the center tab is covered by a <code>UIButton</code> and is slightly larger (much like the instagram app). This works fine. </p>
  
  <p>But what I want is the far right tab bar item to show a overlaying menu when clicked. I don't want it to switch to a <code>viewcontroller</code> with a menu. I want the menu to be displayed no matter which of the other views you're in at the moment. So I want it to act much like a button which is in the tabbar. But I have no idea how to go about doing this. </p>
  
  <p>Should I use a overlaying button over the <code>tabbaritem</code> or should I catch the tabbarclick, but how can I prevent the view from changing in that case? </p>
  
  <p>Thanks you for any help! </p>