title: How to add spacing to lines in NSAttributedString
body: <p>I am making an app that formats screenplays, I am using a NSAttributedString to format the text entered into a UITextView, but some of the lines are too close together.</p>
  
  <p>I was wondering if anyone could provide a code example or a tip on how to alter the margin between these lines so there is more space between them. </p>
  
  <p>Below is an image of another desktop screenwriting program that demonstrates what I mean, notice how there is a bit of space before each bit where it says "DOROTHY".</p>
  
  <p><img src="https://i.stack.imgur.com/B6yao.png" alt="enter image description here"></p>