How to create extension for UIAlertController in swift? - swift

Question

I am trying to modulraise my code I am able to create extension for alertController without target
extension UIViewController {
func showAlert(title: String, message: String) {
let alertController = UIAlertController(title: title, message:
message, preferredStyle: .alert)
alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: {_ in
}))
self.present(alertController, animated: true, completion: nil)
}
}
but I am not sure how to create extension which have target and textfield(how to create and call that in viewcontroller)
my code for which i am trying to create extension
let alertController = UIAlertController(title: "enter name", message: nil, preferredStyle: .alert)
let addAction = UIAlertAction(title: "Ok", style: .default) {_ in
guard let name = alertController.textFields?.first?.text else { return }
let newTask = Task(name: name)
self.toDoStore?.add(newTask, at: 0)
let indexPath = IndexPath(row: 0, section: 0)
self.tableView.insertRows(at: [indexPath], with: .automatic)
}
addAction.isEnabled = false
let cancelAction = UIAlertAction(title: CANCEL_ACTION, style: .cancel, handler: nil)
alertController.addTextField { textField in
textField.placeholder = "enter name.."
textField.addTarget(self, action: #selector(self.handleTextChanged), for: .editingChanged)
}
alertController.addAction(addAction);
alertController.addAction(cancelAction);
present(alertController, animated: true, completion: nil)

Answer 1

You could try the below extension that I'm using made a few changes according to your requirements.
extension UIViewController {
func showAlert(_ title: String?,
message: String?,
actions: [String: UIAlertAction.Style] = [:],
handler: ((UIAlertAction) -> Void)? = nil,
textFields: [((UITextField) -> Void)] = []) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
if actions.isEmpty {
alert.addAction(UIAlertAction(title: "Okay", style: .default))
} else {
for action in actions {
alert.addAction(UIAlertAction(title: action.key, style: action.value, handler: handler))
}
}
for textField in textFields {
alert.addTextField(configurationHandler: textField)
}
present(alert, animated: true)
}
}
A bit of advise you can always check how the parameters that you pass are accepted by the system API and customize your own function in a similar way.