pageViewController(_:viewControllerBefore:)
Returns the view controller before the given view controller.
Declaration
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController?Parameters
- pageViewController:
The page view controller
- viewController:
The view controller that the user navigated away from.
Return Value
The view controller before the given view controller, or nil to indicate that there is no previous view controller.