scheduledLocalNotifications 将为您提供所有预定的列表通知和使用

scheduledLocalNotifications will give you the list of all scheduled notifications and use

- （void）cancelLocalNotification：（UILocalNotification *）通知

或者您可以使用以下方式全部取消：

or you can cancel them all using:

 [[UIApplication sharedApplication] cancelAllLocalNotifications];