Adding swipe gesture to UIView

I used this method to display multiple view controllers into a UIView.
https://github.com/codepath/ios_guides/wiki/Creating-a-Custom-Tab-Bar

How can i add a swipe gesture to that UIView and swipe between that view controllers. Thanks

Start with the linked Creating a Custom Tab Bar guide and determine how it displays multiple view controllers in a UIView. The issue names no repository file or test; done would mean providing a documented way to add swipe handling and move between those view controllers.

Written by the indexing model from the issue text.