Delete UITableVIewCell from another view controller file in Xcode - swift

Question

I have an array "numbers" which I call in my table view file to make the table view cells. When one is clicked it goes to a view controller which shows details about that cell, and in within that view controller is a delete button. How would I delete the item from the array, and reload the data in the table view controller?
So I set it up that when the delete button is clicked it runs an exit code, and deletes the item from the array, and reloads the data. I tried testing it but it never seems to execute.
This is in the detailViewController where it runs the exit function and runs the protocol to delete the item from the array
func deleteNumber() {
self.delegate?.unwind()
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) { // Change `2.0` to the desired number of seconds.
self.performSegue(withIdentifier: "unwindToNumbersList2WithSender", sender: self)
}
}
Then in the table view controller it runs this:
func unwind() {
numbers.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .fade)
saveNumbers()
}
I also tried using:
func unwind() {
numbers.remove(at: indexPath.row)
tableView.reloadData()
saveNumbers()
}
So I wanted it to run an either delete the row or delete the item from the array, and reload the data, but neither of those ran. Is there a way I can delete it from the detail view controlle?

Answer 1

You can use NotificationCenter for doing this,
First you need to add notification in UIViewController like this
let DELETE_DATA = "DELETE_DATA".notificationName()
NotificationCenter.default.addObserver(self, selector: #selector(self.delete_data), name: DELETE_DATA, object: nil)
Make a function named delete_data
#objc func delete_data(_ notification : NSNotification){
let userData = notification.userInfo as? [String:Any] ?? [String:Any]()
// here you can get your wanted index to be deleted.
}
From details view controller you need to POST this notification with index you want to delete
let obj = ["index":`your index to be deleted`]
NotificationCenter.default.post(name: DELETE_DATA, object: nil, userInfo: obj)