Execute a function from other view controller - swift

Question

I have the following interfaces:
In the table view I set the new values for the user and I would like to call the function to update the data from the server when the button "Done" from the main view is pressed.
How I can do it?
I have tried:
#IBAction func doneTapped(_ sender: Any){
ProfileEditingTableViewController().updateData()
}
But all the text fields from the other view are null because it seems to be a new instance of ProfileEditingTableViewController.
updateData() can't be static.
class ProfileEditingViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func cancelButton(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
#IBAction func doneTapped(_ sender: Any) {
// Here I have to save the data from the other View
dismiss(animated: true, completion: nil)
}
}
class ProfileEditingTableViewController: UITableViewController {
func updateData() {
...
}
}

Answer 1

This line
ProfileEditingTableViewController().updateData()
is incorrect as it creates a new instance, you need to use delegate to access the presented ProfileEditingTableViewController
class ProfileEditingTableViewController: UITableViewController {
var profileInstance: ProfileEditingViewController!
}
When you present information from profile:
let info = //
info.delegate = self // here self is the profile instance
Then use:
profileInstance.updateData()
//
Edit: connect the segue source to the vc itself ( yellow circular icon ) , this inside ( ProfileEditingViewController)
self.performSegue(withIdentifier: "goToNext", sender: nil)
//
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
super.prepare(for: segue, sender: sender)
if segue.identifier == "goToNext" {
let des = segue.destination as! ProfileEditingTableViewController
des.profileInstance = self
}
}