title: Animate letters in a label or text view
body: <p>I need to perform an effect like this in my app:</p>
  
  <p><a href="https://i.stack.imgur.com/P84qc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/P84qc.png" alt="letters effect"></a></p>
  
  <p>How can I do this? I need to animate single letters in the text and not the entire label. I'm using Swift. </p>
  
  <p><strong>EDIT</strong> (<em>more details</em>): </p>
  
  <p>I need to animate the letters from right to left using a sort of spring damping (like UIView animation), but I don't know how to achieve this. The most important part of this animation is the first one, where the letters enter from left to right with a variable space between the first ones and the others</p>