Do you need your iOS application to allow users to swipe left and right to change pages? Then a UIPageControl element might be just what you need! Dots at the bottom of the UIPageControl give a visual indication of the number of pages open, as well as the currently selected page. Fun!
You can find examples of this user interface element all over iOS, including switching between open pages in Safari and switching between pages of applications in the iOS home screen (fun fact: the iOS home screen is actually an iOS application itself, and it’s referred to as “Springboard” in the iOS code).