titleLabel.text = payload["alert"]?["title"] as? String ?? ""

var userInfo: [AnyHashable: Any]? {

    didSet {

        if let payload = userInfo?["aps"] as? NSDictionary {

            if let alertTitle = payload["alert"] as? String {

                titleLabel.text = Bundle.main.infoDictionary?["CFBundleName"] as? String
                subtitleLabel.text = alertTitle

            } else {

                titleLabel.text = payload["alert"]?["title"] as? String ?? ""
                subtitleLabel.text = payload["alert"]?["body"] as? String ?? ""
            }

            categoryIdentifier = payload["category"] as? String
            soundName = payload["sound"] as? String
        }
    }
}