Handle a text response

handleTextResponse.swift

class NotificationViewController: UIViewController, UINotificationContentExtension
{
    override func canBecomeFirstResponder() -> Bool {
        return true
    }
     
    override var inputAccessoryView: UIView { 
        get { return inputView }
    }
 
    func didReceive(_ response: UNNotificationResponse,
        completionHandler done: (UNNotificationContentExtensionResponseOption) -> Void)
    {
        if response.actionIdentifier == "comment" {
            becomeFirstResponder()
            textField.becomeFirstResponder()
        }
 
        if let textResponse = response as? UNTextInputNotificationResponse {
            server.send(textResponse.userText) {
                done(.dismiss)
            }
        } 
    }
}