title: Animate navigation bar with a flexible height in xcode 11 using Swift
body: <p>Any ideas how to create like this animation on iOS using Swift ? Thanks</p>
  
  <p><a href="https://i.stack.imgur.com/h49Hi.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/h49Hi.gif" alt="enter image description here"></a></p>