Removing all notification observer from a single place

Question

I want to remove a notification observer and I am using the method:

[[NSNotificationCenter defaultCenter] removeObserver: name:@"myNotification" object:nil]; 

for this. Now there are many observers who are listening to this notification and I want to remove all of them in one shot from a centralised place. Can I pass 'nil' in first parameter and it will remove all observers who are listening to myNotification?

Answer 1

You can remove an object from the notification center all together which means no notifications will get triggered. For example, when I have a view controller that has registered for notifications, I include this line in my dealloc.

[[NSNotificationCenter defaultCenter] removeObserver:self]; 

This is at the object level...so it will unregister for many notifications. It won't unregister for one notification in many objects.

Hope I understood your question correctly.

Answer 2

In case of Swift, you doing it like this:

NSNotificationCenter.defaultCenter().removeObserver(self) 

And in Swift 3:

NotificationCenter.default.removeObserver(self)