title: How can I find the UIView for a specific UITabBarItem?
body: <p>I am using an external library called SwiftyWalkthrough, which allows me to expose only certain views on the screen to guide a new user through my app's UI.  The first item I want exposed to the user is a UITabBarItem.  I need to find the UIView associated with that specific UITabBarItem.  I know the index for the item, and I have given it a tag.  But I haven't found a way for them to help me find the view.  Of course, I only want to use public interfaces to accomplish this.</p>