Override var canBecomeFirstResponder not called in a nested collectionViewController - ios

Question

I am struggling to get inputAccessoryView to show up in my UICollectionViewController. Ok here is a simple explanation of what I have.
A UIPageViewController with 3 ViewControllers as pages - so that I can scroll horizontally between them
PageViewController also has segmented view embedded in navigation bar. Have programmed it in a way where when I press a segment, the PageViewController scrolls to the relevant Viewcontroller
One of the ViewControllers in the PageViewController is my ChatViewController
ChatViewController is a UICollectionViewController
Now ignoring this PageViewController, if I simply present the ChatViewController modally, the following code gets called and everything works as expected. I can see the keyboard, type into the input accessory textview and dismiss it.
Code present in ChatViewController
override var inputAccessoryView: UIView? { //IN ChatViewController
get {
if self.typeReply == true{
return viewForReplyInputAccessory
} else {
return viewForInputAccessory
}
}
}
override var canBecomeFirstResponder: Bool {
return true
}
lazy var viewForInputAccessory: KeyboardView = {
let civ = KeyboardView(frame: .init(x: 0, y: 0, width: view.frame.width, height: 50))
civ.sendButton.isUserInteractionEnabled = true
let gcSend = UITapGestureRecognizer(target: self, action: #selector(handleSend))
civ.addGestureRecognizer(gcSend)
return civ
}()
lazy var viewForReplyInputAccessory: KeyboardReplyView = {
let civ = KeyboardReplyView(frame: .init(x: 0, y: 0, width: view.frame.width, height: 114))
civ.sendButton.isUserInteractionEnabled = true
let gcSend = UITapGestureRecognizer(target: self, action: #selector(handleSend))
civ.addGestureRecognizer(gcSend)
let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleReplyMessageClose))
civ.closeImageView.addGestureRecognizer(gestureRecognizer)
return civ
}()
The Problem
When this ChatViewController comes nested in this UIPageViewController, for some reason, inputAccessoryView is not shown. override var canBecomeFirstResponder: Bool is not called. Again it works if I simply present the ChatViewController modally without nesting it anywhere. Am I doing something wrong?
For more clarity. Here is my Hierarchy:
UINavigationController (has embedded segmented view) -> UIPageViewController -> [VC1, ChatVC, VC3]
Here is the code for my UIPageViewController
class JobsContainerScreenController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {
var controllers = [UIViewController]()
var segmentedControl: UISegmentedControl!
var currentSegment: Int = 0
let jobsDetailScreenController = JobsDetailScreenController()
let jobsChatScreenController = ChatController(collectionViewLayout: UICollectionViewFlowLayout())
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
let index = controllers.firstIndex(where: {$0 == viewController}) ?? 0
if index != 1 {
self.currentSegment = index
}
if index == 0{
self.segmentedControl.selectedSegmentIndex = index
return nil
}
self.segmentedControl.selectedSegmentIndex = index
return controllers[index - 1]
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
let index = controllers.firstIndex(where: {$0 == viewController}) ?? 0
if index != 1 {
self.currentSegment = index
}
if index == controllers.count - 1{
self.segmentedControl.selectedSegmentIndex = index
return nil
}
self.segmentedControl.selectedSegmentIndex = index
return controllers[index + 1]
}
override func viewDidLoad() {
super.viewDidLoad()
setupViews()
handleSegment()
}
fileprivate func setupViews() {
view.backgroundColor = .white
self.overrideUserInterfaceStyle = .light
dataSource = self
delegate = self
view.isUserInteractionEnabled = true
let navBarAppearance = UINavigationBarAppearance()
navBarAppearance.configureWithOpaqueBackground()
navBarAppearance.backgroundColor = .white
navBarAppearance.shadowColor = .clear
let backImage = UIImage(systemName: ImageBackArrow)?.withRenderingMode(.alwaysTemplate)
let leftBarButtonItem = UIBarButtonItem(image: backImage, style: .plain, target: self, action: #selector(handleBack))
navigationItem.leftBarButtonItem = leftBarButtonItem
navigationItem.leftBarButtonItem?.tintColor = ColorBlackAlpha
navigationController?.navigationBar.standardAppearance = navBarAppearance
navigationController?.navigationBar.scrollEdgeAppearance = navBarAppearance
self.segmentedControl = UISegmentedControl(items: ["Activity", "Chat", "Contract"])
self.segmentedControl.sizeToFit()
self.segmentedControl.backgroundColor = UIColor.black.withAlphaComponent(0.01)
self.segmentedControl.selectedSegmentTintColor = UIColor.white
self.segmentedControl.selectedSegmentIndex = 0
self.segmentedControl.setTitleTextAttributes([NSAttributedString.Key.font : UIFont(name: FontPromptBold, size: 14)!, NSAttributedString.Key.foregroundColor: ColorBlackLow], for: .normal)
self.segmentedControl.setTitleTextAttributes([NSAttributedString.Key.font : UIFont(name: FontPromptBold, size: 14)!, NSAttributedString.Key.foregroundColor: ColorDarkGreen], for: .selected)
self.segmentedControl.addTarget(self, action: #selector(handleSegment), for: .valueChanged)
self.navigationItem.titleView = segmentedControl
jobsDetailScreenController.job = self.job
jobsChatScreenController.job = self.job
let jobsContractScreenController = JobsContractScreenController()
controllers = [jobsDetailScreenController, jobsChatScreenController, jobsContractScreenController]
setViewControllers([controllers.first!], direction: .forward, animated: false, completion: nil)
}
#objc func handleSegment() {
if self.segmentedControl.selectedSegmentIndex == 0 {
currentSegment = 0
setViewControllers([controllers.first!], direction: .reverse, animated: true, completion: nil)
} else if segmentedControl.selectedSegmentIndex == 1 {
if currentSegment == 0 {
setViewControllers([controllers[1]], direction: .forward, animated: true, completion: nil)
} else {
setViewControllers([controllers[1]], direction: .reverse, animated: true, completion: nil)
}
} else {
currentSegment = 2
setViewControllers([controllers[2]], direction: .forward, animated: true, completion: nil)
}
}
}