UITableView cell invokes UIAlertController popup ..."present" error - swift

Question

I have a tableview definition in which I am attempting to invoke an UIAlertController popup. I installed a button in the prototype tableView cell, when the button is touched, an IBAction handles the event. The problem is that the compiler won't let me.
present(alertController, animated: true, completion: nil)
Generates compiler error: "Use of unresolved identifier 'present'
Here is the code:
class allListsCell: UITableViewCell {
#IBOutlet var cellLable: UIView!
#IBOutlet var cellSelected: UILabel!
var colorIndex = Int()
#IBAction func cellMarkButton(_ sender: UIButton, forEvent event: UIEvent) {
if colors[self.colorIndex].selected == false {
colors[self.colorIndex].selected = true
cellSelected.text = "•"
let alertController = UIAlertController(title: "???", message: "alertA", preferredStyle: .alert)
let OKAction = UIAlertAction(title: "dismiss", style: .default) { (action:UIAlertAction!) in
print("Sand: you have pressed the Dismiss button");
}
alertController.addAction(OKAction)
present(alertController, animated: true, completion: nil) // ERROR
} else {
colors[self.colorIndex].selected = false
cellSelected.text = ""
}
}
If I comment that one line, the app runs correctly for each cell...

Answer 1

You can't call present AlertController inside a tableView cell , it needs a subclass of UIViewController or other equivalent one , you should use a delegate or some sort of notification to handle that , see my answer here for the same problem AlertControllerCallInsideCell
Edit : Form Docs , it's an instance method inside UIViewController . so it can't be called inside any other class of other type (UITableViewCell) in your case

Answer 2

It is not possible to call the "present" method from a TableViewCell, I recommend having a function in the main controller to show your UIAlertController.
Using this code you can instantiate the parent driver and execute any available function:
extension UIView {
var parentViewController: UIViewController? {
var parentResponder: UIResponder? = self
while parentResponder != nil {
parentResponder = parentResponder!.next
if let viewController = parentResponder as? UIViewController {
return viewController
}
}
return nil
}
}
//UITableViewCell
if let controller = self.parentViewController as? YourController
{
controller.showAlert()
}
Here is an example of its use with a CollectionViewCell:
https://github.com/AngelH2/CollectionViewCell-Comunication/tree/master/CollectionCellAction