Is there an easier way to edit, for example, the alertBody property of an already scheduled UILocalNotification ?
For now, I just cancel the notification and schedule a new one but when the app needs to do this for 3 or more notifications, it takes long time to execute...
If the documentation is correct, you can't alter an already scheduled notification. The doc states for -scheduleLocalNotification::
[…] Because the operating system copies notification, you may release it once you have scheduled it.
The notification object is copied by the system and not accessible via any (public) method. So there's no other solution than canceling the notification.
You can't edit it, but you can achieve a similar effect by canceling a notification and scheduling a new one to replace it with the new data. Use
- (void)cancelLocalNotification:(UILocalNotification *)notification
来源：https://stackoverflow.com/questions/3842252/is-there-a-simple-way-to-edit-modify-a-uilocalnotification