You need to add another Child View with a scroll with the name (scrollContainerVw) and set the following contacts:
to view the scroll and view for children.

If you want to support multiple screens, please add the following code in the field of view:
self.scrollVw.frame.size.width = self.view.frame.size.width
self.scrollVw.frame.size.height = self.view.frame.size.height
self.scrollContainerVw.frame.size.width = self.view.frame.size.width
self.scrollContainerVw.frame.size.height = self.view.frame.size.height