Get frame of selected tab bar item

[buguibu]

• Init items with index based tag property

  tabBarItem = UITabBarItem(title: nil,
                                              image: image.),
                                              tag: indexAsTag)

• On item selected:

  override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {

• Get tab bar subviews but only buttons and sort them by x position:

  extension UITabBar {
  
  func xOriginSortedViewItems() -> [UIView] {
      return subviews
          .filter { $0.isUserInteractionEnabled }
          .sorted(by: { $0.frame.origin.x < $1.frame.origin.x })
  }
  }

• Access item by index:

      let selectedTabBarItemView = tabBar.xOriginSortedViewItems()[tag]