title: iOS/Swift - Hide/Show UITabBarController when scrolling down/up
body: <p>I'm quite new to iOS development. Right now i'm trying to hide my tabbar when I scroll down and when scrolling up the tabbar should appear. I would like to have this animated in the same way like the navigation bar. For the navigation bar I simply clicked the option in the Attributes Inspector. I saw some examples for the toolbar, but I cant adopt it the tabbar.</p>
  
  <p><code>self.tabBarController?.tabBar.hidden = true</code> just hides my tabbar, but its not animated like the navigation controller. </p>