title: Adding a header and text to UITextView
body: <p>I thought this would be simple but it's proving not to be.</p>
  
  <p>I have some text that I need to display in my app. What is the best way to present it? Because I want the text but also want a header - the header will be larger. I know <code>UITextView</code> only allows 1 type of font/size.</p>
  
  <p>Example of what I want</p>
  
  <p><strong>Example Header</strong> - Bold size 22</p>
  
  <p>Text - size 16</p>
  
  <p>How do I do this?</p>