title: Find Out Default Font Size of Title for UITabBar?
body: <p>I have a UITabBarController. It has two tabs. They are labelled "FirstTitle" and "SecondTitle." How can I find out what the default font size for these titles are? </p>
  
  <p>In ViewDidLoad, for my first View Controller, which corresponds to my first tab, I have tried:</p>
  
  <pre><code>print(self.tabBarController?.tabBar.items?[0].titleTextAttributes(for: 
  .normal))
  print(self.tabBarController?.tabBar.items?[0].titleTextAttributes(for: 
  .selected))
  let appearance = UITabBarItem.appearance()
  print(appearance.titleTextAttributes(for: .normal))
  </code></pre>
  
  <p>All of these return "nil." In addition, there is no default font size for the tab bar shown anywhere in Main.storyboard. </p>