title: How to render HTML string in UITextview with different font styles but same font family
body: <p>This is my HTML string:</p>
  
  <pre><code>&lt;i&gt;Italics &lt;/i&gt;&lt;b&gt;Bold &lt;/b&gt;&lt;u&gt;Underline&lt;/u&gt;&lt;blockquote&gt;block quote&lt;br&gt;&lt;/blockquote&gt;
  </code></pre>
  
  <p>I want all the styling to be same (Italic, bold etc), but I want to implement the font family as Open Sans. So, wherever its italics I want the font to be Open-Sans Italics. How do I implement that? Please help.</p>