The UIPageControl class is used in iOS to to create and manage page controls.
A page control is a succession of dots centered in the control. Each dot corresponds to a page in the application’s document (or other data-model entity), with the white dot indicating the currently viewed page.
When a user taps a page control to move to the next or previous page, the control sends the UIControlEventValueChanged event for handling by the delegate. The delegate can then evaluate the currentPage property to determine the page to display. The page control advances only one page in either direction.