title: Create UI chat like whatsapp and how to create event touch in navigation bar (iOS xamarin)
body: <p>I would like to ask about iOS xamarin. I'm creating an application similar to whatsapp, but I ran into the following problems:</p>
  
  <ol>
  <li><p>Creating an UI like whatsapp in navigation bar (title bar), I dragged <code>ImageView</code>/<code>Label</code> on there, but the <code>ImageView</code>/<code>Label</code> was covered by navigation bar. Just like in the picture below: <img src="https://i.stack.imgur.com/lNRVS.png" alt="UI whatsapp"></p></li>
  <li><p>When the navigation bar is clicked, I want to direct the user to another controller, but I don't know how to create the event touch/click in navigation bar. Could you give me some pointers on that?</p></li>
  </ol>