title: Adding an HUD spinner to a label as a subview
body: <p>I have a label <code>textLabel</code> that I want to display a spinner over.</p>
  
  <p>I have the Xamarin component <code>BTProgressHUD</code> and use the following code to display a spinner across the whole view:</p>
  
  <pre><code>BTProgressHUD.Show();
  </code></pre>
  
  <p>However, I want to display a spinner ONLY in my <code>textLabel</code> and not the whole view. </p>
  
  <p>Is this at all possible? </p>