Pass data on each ChildViewController to next ChildViewController on UIPageViewController - ios

Question

I have an object from Realm and i assign each control to object, what i want is to pass each object that i assign on each childVC to the next childVC.
I have the object initialized on my UIPageViewcontroller:
var artist = Artist()
I use this function to scroll to nextViewController :
func scrollToViewController(index newIndex: Int) {
if let firstViewController = viewControllers?.first,
let currentIndex = orderedViewControllers.index(of: firstViewController) {
let direction: UIPageViewControllerNavigationDirection = newIndex >= currentIndex ? .forward : .reverse
let nextViewController = orderedViewControllers[newIndex]
scrollToViewController(viewController: nextViewController, direction: direction)
}
}
And i assign each textbox, label to this object on childVC FirstViewController:
artist.artistName = textField.text!
Same is on the next childVC SecondViewvController:
artist.genre = genres[0]
I want to pass each control value that i assign from previous VieController to the next ViewController, for example:
On my SecondViewController i want to have the previous value saved on artist.artistName and assign the value that i get from label. For example just to print the previous value on viewDidload.
class SecondViewController {
var artistNameFromFirstVC: String?
override func viewDidLoad() {
super.viewDidLoad()
print("ArtisName: \(artistNameFromFirstVC)")
// Setup Views
setupCollectionView()
}
...
}
I have more than 2 childControllers, so i want to pass each previous values to next controllers.
I appreciate any help. Thank you :)

Answer 1

Helps?
struct Artist {
var name: String
var genre: String
}
class FirstViewController: UIViewController {
var name:String?
}
class SecondViewController: UIViewController {
var genre:String?
}
enum ScrollController: Int {
case first = 0
case second
init(with index: Int) {
self = ScrollController(rawValue: index) ?? .first
}
var controller: (Artist) -> UIViewController {
return { artist in
switch self {
case .first:
let controller = FirstViewController()
controller.name = artist.name
return controller
case .second:
let controller = SecondViewController()
controller.genre = artist.genre
return controller
}
}
}
}
func scrollToViewController(index newIndex: Int) {
if let firstViewController = viewControllers?.first,
let currentIndex = orderedViewControllers.index(of: firstViewController) {
let direction: UIPageViewControllerNavigationDirection = newIndex >= currentIndex ? .forward : .reverse
let nextViewController = ScrollController(with: newIndex).controller
scrollToViewController(viewController: nextViewController, direction: direction)
}
}