Sceduled local notifications in iOS

I cannot find a proper tutorial on sending scheduled local notifications

I came up with this but below code is not workingit is not working

void Start ()

{
	LocalNotification notif = new LocalNotification();

	notif.fireDate          = System.DateTime.Now.AddSeconds(5f);

	notif.alertBody         = "Hey";	

	NotificationServices.ScheduleLocalNotification(notif);

    }

Please help me with this

I know this is an old post so this is for the people who arrived here from Google, like I did. You need to register for notifications before you schedule a notification.

void Awake() {
		NotificationServices.RegisterForNotifications(
			NotificationType.Alert | 
			NotificationType.Badge | 
			NotificationType.Sound);
}