title: How to refresh Tab Bar Items in swift ios
body: <p>I do app like <code>Instagram</code> with tab bar items. In app I have <code>simple user</code> and <code>company user</code>. </p>
  
  <p>I have main ViewController:</p>
  
  <pre><code>MainTabBarController: UITabBarController
  </code></pre>
  
  <p>with 5 tab bar items. And each item has own <code>ViewController</code></p>
  
  <p><strong>I need refresh <code>MainTabBarController</code> when user is <code>Simple user</code> it is 5 items and when user is <code>Company user</code> it is 4 items. How to refresh or reload without close app?</strong></p>
  
  <p>One solution I already do with UserDefaults, but need close app.</p>
  
  <p><strong>Platform iOS > 9.0, Swift 3.0</strong></p>