Complex UIAlertController with field and actions

.swift

//We can change preferredStyle: .actionSheet
let alert = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert)

//Add Cancel Action
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler:  nil))

//Add Default Action
alert.addAction(UIAlertAction(title: "Default", style: .default, handler:  { action in
    print("Default button did tap")
}))

//Add Default2 Action
let default2Action = UIAlertAction(title: "Default 2", style: .default, handler:  { action in
    print("Default2 button did tap")
})
alert.addAction(default2Action)

alert.preferredAction = default2Action

//Add Default Action
alert.addAction(UIAlertAction(title: "Destructive", style: .destructive, handler:  { action in
    print("Destructive button did tap")
}))

//Add Default Action
alert.addTextField { (field) in
    field.placeholder = "Pet Name"
    field.addTarget(self, action: #selector(self.editingChanged), for: .editingChanged)
}

self.present(alert, animated: true, completion: nil)