How to edit the content of a Table Cell in Swift 3 - ios

Question

I am a beginner at Swift 3. I have a Table View, and the user can delete a table view cell. Now I want the user to be able to change the content of the cell. I have an array that contains four names ["Stremmel", "Emma", "Sam", "Daisy"] and I want the user to be able to say edit Stremmel to George.
I searched for documentation or a similar question that could help me to figure a way to do so, but I got more confused. Can someone please provide me with some help!! Thank you. Here is my table view:
import UIKit
var list = ["Stremmel" , "Emma" , "Sam" , "Daisy"]
class ViewController: UITableViewController {
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return list.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = list[indexPath.row]
return cell
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == UITableViewCellEditingStyle.delete
{
list.remove(at: indexPath.row)
tableView.reloadData()
}
}

Answer 1

If you want to show Edit button also with Delete button then you need to implement editActionsForRowAt method with canEditRowAt method instead of commit editingStyle.
After that with editActionsForRowAt show AlertController with textField and update its value and reload the row. So remove or comment the commit editingStyle method from your code and add below two methods.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
let editAction = UITableViewRowAction(style: .default, title: "Edit", handler: { (action, indexPath) in
let alert = UIAlertController(title: "", message: "Edit list item", preferredStyle: .alert)
alert.addTextField(configurationHandler: { (textField) in
textField.text = self.list[indexPath.row]
})
alert.addAction(UIAlertAction(title: "Update", style: .default, handler: { (updateAction) in
self.list[indexPath.row] = alert.textFields!.first!.text!
self.tableView.reloadRows(at: [indexPath], with: .fade)
}))
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(alert, animated: false)
})
let deleteAction = UITableViewRowAction(style: .default, title: "Delete", handler: { (action, indexPath) in
self.list.remove(at: indexPath.row)
tableView.reloadData()
})
return [deleteAction, editAction]
}

Answer 2

Normally when creating a UITableViewController() class, you should have some template code that provides a edit-button and a delete-function (should be included in the edit button)! Just uncomment it, it should be accessible then!
or you could just call self.editButtonItem() in the viewDidLoad()-function.
I'm sorry for my bad English, I hope that answered you question!