     
     override func viewDidLoad() {
         super.viewDidLoad()
+        
+        minutesTextField.delegate = self
+        secondsTextField.delegate = self
         
         minutesTextField.inputView = UIView()
         secondsTextField.inputView = UIView()

        }
    }
    
    #warning("FIXME: Only called manually on UIButton touch. Needs to be called for BT Keyboard")
    func validateInput(_ string: String, forTextField textField: UITextField) -> Bool {
        guard let text = textField.text else { return false }    // must have an existing string
        

        delegate.dismiss(animated: true, completion: nil)
    }
}


// MARK: UITextFieldDelegate
extension CountdownLengthController: UITextFieldDelegate {
    // called when input is from an external keyboard and not the keypad buttons
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        validateInput(string, forTextField: textField)
    }
}
