enum AlertAction {
    case title(title: String)
    case titleWithPopAction (title: String)
    case titleWithSettingsAction (title: String)
    case titleWithAppStoreAction (title : String)
    case titleWithHandler (title: String, completionHandler: AlertControllerCompletionHandler?)

    var action: UIAlertAction {
        switch self {

        case let .title(title):
            return UIAlertAction(title: title, style: .default) { _ in }

        case let .titleWithPopAction(title):
            return UIAlertAction(title: title, style: .default) { _ in
                NavigationManager.shared.popVC() //Create Navigation manager class in your app which handles  POP, PUSH, PRESENT VC.
            }

        case let .titleWithSettingsAction(title):
            return UIAlertAction(title: title, style: .default) { _ in
                NavigationManager.shared.popVC(animated: false)
                afterDelay(0.2) {
                    UIApplication.shared.openURL(URL(string:"prefs:root")!)
                }
            }

        case let .titleWithAppStoreAction(title):
            return UIAlertAction(title: title, style: .default) { _ in
                afterDelay(0.2) {
                    UIApplication.shared.openURL(URL(string: k_App_Store_url)!)
                }
            }

        case let .titleWithHandler(title, completionHandler):
            return UIAlertAction(title: title, style: .default) { action in
                completionHandler?(action)
            }

        }
    }
}