Popup alert user before delete TableViewCell in swift? - ios

Question

title basically says it; surprised I couldn't find anything on stack overview but none helped me or were in objective C
I have a table view with a list of items and an edit button that allows user to delete rows (can also 'swipe to delete'). basically, I want to have a popup alert that says "are you sure you want to delete (rowname)" where row name is the name of the row about to be deleted. from what I have found/tried, I can get the popup BUT it shows up every time you press the edit button or swipe right. I only want the popup to appear when the user presses "delete".
and, obviously, from the popup if they press Cancel it should cancel, if they press delete it should delete
how do you do this in general?
sorry I am kind of a noob

Answer 1

All you have to do is present the alert when the button is pressed and set each action.
Replace your commit editingStyle delegate method with this and replace the data variable with your data array:
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
presentDeletionFailsafe(indexPath: indexPath)
}
}
func presentDeletionFailsafe(indexPath: IndexPath) {
let alert = UIAlertController(title: nil, message: "Are you sure you'd like to delete this cell", preferredStyle: .alert)
// yes action
let yesAction = UIAlertAction(title: "Yes", style: .default) { _ in
// replace data variable with your own data array
self.data.remove(at: indexPath.row)
self.tableView.deleteRows(at: [indexPath], with: .fade)
}
alert.addAction(yesAction)
// cancel action
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
present(alert, animated: true, completion: nil)
}
EDIT
Example:
private let reuseId = "cellReuseId"
class SlideToDeleteViewController : UIViewController {
lazy var tableView = createTableView()
func createTableView() -> UITableView {
let tableView = UITableView()
tableView.register(UITableViewCell.self, forCellReuseIdentifier: reuseId)
tableView.dataSource = self
tableView.delegate = self
return tableView
}
var data = ["one", "two", "three", "four"]
override func loadView() {
self.view = tableView
}
override func viewDidLoad() {
super.viewDidLoad()
}
}
extension SlideToDeleteViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: reuseId)
cell?.textLabel?.text = data[indexPath.row]
return cell!
}
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
presentDeletionFailsafe(indexPath: indexPath)
}
}
func presentDeletionFailsafe(indexPath: IndexPath) {
let alert = UIAlertController(title: nil, message: "Are you sure you'd like to delete this cell", preferredStyle: .alert)
// yes action
let yesAction = UIAlertAction(title: "Yes", style: .default) { _ in
// put code to remove tableView cell here
self.data.remove(at: indexPath.row)
self.tableView.deleteRows(at: [indexPath], with: .fade)
}
alert.addAction(yesAction)
// cancel action
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
present(alert, animated: true, completion: nil)
}
}