title: How to create attribute for Underline on UILabel?
body: <p>I already have this attribute on my code, but how to add attribute for underline?</p>
  
  <pre><code>NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys: 
  boldFont, NSFontAttributeName, foregroundColor, NSForegroundColorAttributeName, nil];
  </code></pre>