title: Scrollable floating action button using swift
body: <p>i am trying to achieve something close to the image below.<a href="https://i.stack.imgur.com/a7iyH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/a7iyH.png" alt="enter image description here"></a></p>
  
  <p>and i have used the floating action button from this link <a href="https://github.com/lourenco-marinho/ActionButton" rel="nofollow noreferrer">enter link description here</a>. </p>
  
  <p>i am having trouble setting the auto layout constraints to look almost like in picture i have attached. The floating action button has to be placed between the table view head and tableview cell. but the constraints must be set with respect to the tableview cell.</p>
  
  <p>ones the button reaches the top it should glide just below the navigation bar!!</p>
  
  <p>any ideas guys?
  Thank in advance.</p>