Can I get all existing Notification Center messages using Swift?

Question

I'm wondering is there a way to get all of the messages in Notification Center.

I already know how to post a message, but I don't know whether I can get the messages posted by other Apps into my App for usage.

Answer 1

No, you cannot access this information from an app

Answer 2

Yes, you can:

CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), nil, { (_, observer, name, _, _) in
        print("Notification \(name) received")
        }, nil, nil, .deliverImmediately)

But be careful, there are a lot of notifications. :-)

Please consider also this SO question.