Swift - Cannot pass value successfully to the ViewController that is presented next - ios

Question

I have an ItemsController and I want to pass a value to the RepostController when using self.navigationController?.pushViewController(destination, animated: true) to present the RepostController. I want to set the itemId of the RepostController to be cell.item!.getId(). But in the RepostController, I always get a value of 0 from the itemId. I have also tried to print the values. They are commented in the codes below.
I'm using Swift 4 with Xcode 10.1.
// ITEMS CONTROLLER
override func viewDidLoad() {
super.viewDidLoad()
navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor(red:0.30, green:0.30, blue:0.30, alpha:1.0)]
self.navigationController?.navigationBar.tintColor = UIColor(red:0.30, green:0.30, blue:0.30, alpha:1.0)
self.navigationController?.navigationBar.shadowImage = UIImage()
tableView.estimatedRowHeight = 250
tableView.rowHeight = UITableView.automaticDimension
DispatchQueue.main.async() {
self.refresh(sender: self)
self.tableView.reloadData()
}
if #available(iOS 11.0, *) {
self.navigationController?.navigationBar.prefersLargeTitles = true
}
if ((profileId == iApp.sharedInstance.getId() && pageId == Constants.ITEMS_PROFILE_PAGE) || pageId == Constants.ITEMS_FEED_PAGE || pageId == Constants.ITEMS_STREAM_PAGE) {
let newItemButton = UIBarButtonItem(barButtonSystemItem: .add , target: self, action: #selector(newItem))
self.navigationItem.rightBarButtonItem = newItemButton
}
// add tableview delegate
tableView.delegate = self
tableView.dataSource = self
self.tableView.tableFooterView = UIView()
self.refreshControl.addTarget(self, action: #selector(refresh), for: UIControl.Event.valueChanged)
self.tableView.addSubview(refreshControl)
self.tableView.alwaysBounceVertical = true
// prepare for loading data
self.showLoadingScreen()
// start loading data
self.loadData()
}
func showRepostButton(cell: ItemCell) {
let storyboard = UIStoryboard(name: "Content", bundle: Bundle.main)
let destination = storyboard.instantiateViewController(withIdentifier: "RepostController") as! RepostController
destination.itemId = cell.item!.getId()
print (String(cell.item!.getId())) // Whatever the correct value is (such as 20)
self.navigationController?.pushViewController(destination, animated: true)
}
// REPOST CONTROLLER
override func viewDidLoad() {
super.viewDidLoad()
navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor(red:0.30, green:0.30, blue:0.30, alpha:1.0)]
self.navigationController?.navigationBar.tintColor = UIColor(red:0.30, green:0.30, blue:0.30, alpha:1.0)
textView.delegate = self
textView.tintColor = UIColor(red:0.23, green:0.72, blue:0.65, alpha:1.0)
print ("itemID:" + String(self.itemId))
}
#IBAction func cancelTap(_ sender: Any) {
self.dismiss(animated: true, completion: nil)
}
#IBAction func repostTap(_ sender: Any) {
self.message = self.textView.text
send()
}
I need the value to be passed to the RepostController successfully.
What changes do I need to make? Thanks!

Answer 1

What I would do is create a PUSH segue in IB. Then in the prepare(forSegue:) method:
if let dest = segue.destination as? YourDestinationVC {
dest.itemId = someValue
}