Pass data from child controller to PageViewController

Question

I have a PageViewcontroller has 3 child controllers. I want to pass data from first child to Root PageViewController This is my Root Controller.

I tried :

class RootViewController: UIPageViewController ,UIPageViewControllerDataSource{

var isSelectAnything : Bool = false


func addRightBottom(sendBool : Bool){
    self.isSelectAnything = sendBool
    print(isSelectAnything) // always return false even I select a cell from my child



}

This is my Child Controller.

class FirstView: UIViewController,UICollectionViewDelegate,UICollectionViewDataSource {

//There is a collectionview and this method works on :

  func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

let sendData = RootViewController()
        sendData.addRightBottom(sendBool: true)



}

When I select a cell from collectionview I want to change isSelectAnything value with true but its always return false.I searched but cant find any solutions.

I tried protocols but Its didnt work again

Answer 1

Change

let sendData = RootViewController()

To

let sendData = parent as! RootViewController