title: How to implement a floating "New Mail Button" similar to gmail in IOS?
body: <p>I want to add a button like the "New Mail" button in the Gmail app (The circle button bottom of right with pen icon), which is floating on the screen. Can someone show me how to do this in ios? </p>
  
  <p>Gmail floating button</p>
  
  <p><a href="https://i.stack.imgur.com/WOjil.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WOjil.png" alt="enter image description here"></a></p>