Saved object array not showing up in new ViewController - ios

Question

Every time my add button is pressed I am attempting to append that specific item into an array of Item. It prints in the console for each new cell, however when I push to a new ViewController, which will be a summary of all the items added, it does not print the items. Only an empty array is printed.
class CollectionViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout, PostCellDelegate {
var finalList = [Item]()
#objc func addTapped(cell: PostCell) {
guard let indexPath = self.collectionView.indexPath(for: cell) else {return}
hiddenRows.insert(indexPath.row)
cell.removeButton.isHidden = false
let item = itemsArr[indexPath.row]
finalList.append(item)
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellId", for: indexPath) as! PostCell
cell.delegate = self
let item = itemsArr[indexPath.row]
cell.set(name: item.name, brand: item.brand, price: item.price)
print(finalList)
return cell
}
#objc private func handleNext() {
let nextIndex = min(pageControl.currentPage + 1, itemsArr.count - 1)
let indexPath = IndexPath(item: nextIndex, section: 0)
if pageControl.currentPage == 4{
let checkoutView = FinishViewController()
self.navigationController?.pushViewController(checkoutView, animated: true)
checkoutView.modalPresentationStyle = .overCurrentContext
present(checkoutView, animated: true)
print("last item")
}else {
print("not last")
}
pageControl.currentPage = nextIndex
collectionView?.scrollToItem(at: indexPath, at: .centeredHorizontally, animated: true)
}
lazy var pageControl: UIPageControl = {
let pc = UIPageControl()
pc.currentPage = 0
pc.numberOfPages = 4
pc.currentPageIndicatorTintColor = .red
pc.pageIndicatorTintColor = UIColor(red: 249/255, green: 207/255, blue: 224/255, alpha: 1)
return pc
}()
class FinishViewController: UIViewController {
let cV = CollectionViewController()
override func viewDidLoad() {
print(cV.finalList)
super.viewDidLoad()
view.backgroundColor = .red
}

Answer 1

The issue is that in the FinishViewController you are initializing a new instance of CollectionViewController, so the property has the default empty array value.
You need to pass in the array to the FinishViewController when you present or segue to it.
In FinishViewController add the following:
var finalList = [Item]()
And in handleNext make sure you set finalList correctly:
let checkoutView = FinishViewController()
checkoutView.finalList = self.finalList

Answer 2

#objc func addTapped(cell: PostCell) {
guard let indexPath = self.collectionView.indexPath(for: cell) else
{return}
hiddenRows.insert(indexPath.row)
cell.removeButton.isHidden = false
let item = itemsArr[indexPath.row]
finalList.append(item)
collectionView?.reloadData() <---- add this
}