Present UIPageViewController with Modal Presentation Style - ios

Question

Currently i'm displaying modally a view controller, (embedded in in navigation) with a UIscrollView as subview. I would like to replace the scroll view with an UIPageViewController, but i cant resize the UIPageViewController neither displaying it modally. Solution, ideas?
This is the code that i have now:
UIViewController *viewController = [[UIViewController alloc] init];
UINavigationController *modalNav = [[UINavigationController alloc] initWithRootViewController:viewController];
UIBarButtonItem *dismiss = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel
target:self
action:#selector(dismissModalViewControllerAnimated:)];
modalNav.navigationBar.topItem.leftBarButtonItem = dismiss;
modalNav.modalPresentationStyle = UIModalPresentationFormSheet;

Answer 1

View controllers can be embedded into one another by using the container view.
Remove your scroll view and put a container view in its place. You'll see that a view controller is embedded it in by default. Delete the embed segue, drag and drop a UIPageViewController into your storyboard and embed it in the container view.
It should look something like below.

Answer 2

The better way is to create a viewcontroller, add uipageviewcontrolller as its sub view.
Here is my code for Gallery Container Page. I made a push segue to Gallery Container Page so as to avoid navigation troubles (now the parent view controller for PageViewController is Gallery Container.)
import UIKit
class GalleryContainerPage: UIViewController,UIPageViewControllerDataSource {
private var pageViewController: UIPageViewController?
private let contentImages = ["person-icon.jpg",
"3807343799880.jpg","4701365629867.jpg","4713011921017.jpg"]
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.navigationBarHidden = false
// Do any additional setup after loading the view.
}
private func createPageViewController() {
let pageController = self.storyboard!.instantiateViewControllerWithIdentifier("PageController") as! UIPageViewController
pageController.dataSource = self
if contentImages.count > 0 {
let firstController = getItemController(0)!
let startingViewControllers: NSArray = [firstController]
pageController.setViewControllers(startingViewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: false, completion: nil)
}
pageViewController = pageController
addChildViewController(pageViewController!)
pageViewController!.didMoveToParentViewController(self)
self.view.addSubview(pageViewController!.view)
}
private func setupPageControl() {
let appearance = UIPageControl.appearance()
appearance.pageIndicatorTintColor = UIColor.grayColor()
appearance.currentPageIndicatorTintColor = UIColor.whiteColor()
appearance.backgroundColor = UIColor.darkGrayColor()
}
func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
let itemController = viewController as! PageItemController
if itemController.itemIndex > 0 {
return getItemController(itemController.itemIndex-1)
}
return nil
}
func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
let itemController = viewController as! PageItemController
if itemController.itemIndex+1 < contentImages.count {
return getItemController(itemController.itemIndex+1)
}
return nil
}
private func getItemController(itemIndex: Int) -> PageItemController? {
if itemIndex < contentImages.count {
let pageItemController = self.storyboard!.instantiateViewControllerWithIdentifier("ItemController") as! PageItemController
pageItemController.itemIndex = itemIndex
pageItemController.imageName = contentImages[itemIndex]
return pageItemController
}
return nil
}
func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
return contentImages.count
}
func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
return 0
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(animated: Bool) {
setupPageControl()
createPageViewController()
}
}