如何暂时禁用我的iPhone应用程序安排的所有本地通知？

Is there any method to temporarily disable all local notifications created by an iPhone app? I need to re enable them all with respect to a condition. my requirement is if the user turned off the notification button on my app , then no more notifications is shown.If he turned it on then all notifications should be shown. Any idea?Is there any method to temporarily disable all