Pageview scrollview is not workout - ios

Question

This is my code for pageView . It does not scroll. I am using swift2 because of unavailability of swift4 in my setup. Can anyone help me I am Fresher!
import UIKit
class TutorialPageViewController:UIPageViewController,UIPageViewControllerDataSource,UIPageViewControllerDelegate
{
//Storyboard class and id -
//ViewController1,ViewController2,ViewController3
private(set) lazy var orderedViewControllers: [UIViewController] = {
return [self.newColoredViewController("ViewController1"),
self.newColoredViewController("ViewController2"),
self.newColoredViewController("ViewController3")]
}()
private func newColoredViewController(name: String) -> UIViewController {
return UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("name")
}
//code of pageview
override func viewDidLoad() {
super.viewDidLoad()
self.dataSource = self
self.delegate = self
if let ViewController1 = orderedViewControllers.first {
setViewControllers([ViewController1],
direction: .Forward,
animated: true,
completion: nil)
}
}

Answer 1

You need to implement UIPageViewControllerDataSource too :
extension Yourcontroller: UIPageViewControllerDataSource{
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
return nil
}
let previousIndex = viewControllerIndex - 1
// User is on the first view controller and swiped left to loop to
// the last view controller.
guard previousIndex >= 0 else {
return orderedViewControllers.last
// Uncommment the line below, remove the line above if you don't want the page control to loop.
//return nil
}
guard orderedViewControllers.count > previousIndex else {
return nil
}
return orderedViewControllers[previousIndex]
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
return nil
}
let nextIndex = viewControllerIndex + 1
let orderedViewControllersCount = orderedViewControllers.count
// User is on the last view controller and swiped right to loop to
// the first view controller.
guard orderedViewControllersCount != nextIndex else {
return orderedViewControllers.first
// Uncommment the line below, remove the line above if you don't want the page control to loop.
//return nil
}
guard orderedViewControllersCount > nextIndex else {
return nil
}
return orderedViewControllers[nextIndex]
}
}