Exploring UIAlertController in swift

AlertWithTextInput.swift

    /**
     Simple Alert with Text input
     */
    func showAlertWithTextField() {
        let alertController = UIAlertController(title: "Add new tag", message: nil, preferredStyle: .alert)
        let confirmAction = UIAlertAction(title: "Add", style: .default) { (_) in
            if let txtField = alertController.textFields?.first, let text = txtField.text {
                // operations
                print("Text==>" + text)
            }
        }
        let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) { (_) in }
        alertController.addTextField { (textField) in
            textField.placeholder = "Tag"
        }
        alertController.addAction(confirmAction)
        alertController.addAction(cancelAction)
        self.present(alertController, animated: true, completion: nil)
    }