title: Swift Tabbar with a rounded hole in the middle
body: <p>I am trying to achieve the following design in my app:</p>
  
  <p><a href="https://i.stack.imgur.com/nbAg3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nbAg3.png" alt="Tabbar"></a></p>
  
  <p>As you can see, the tabbar has a raised center button. However, this is not the only thing as there should be a real hole in the tabbar so that it is transparent there.</p>
  
  <p>How can I create such a hole inside a tabbar? And then put a raised, round button in that hole?</p>
  
  <p>I would gladly appreciate any help regarding my question.</p>