objective c - NSNotificationCenter : list of observers?

Question

Is it possible to get the list of observers (objects and selectors) for a given notification name? (NSNotificationCenter)

Answer 1

(iOS 9, Swift 3) If you want to find out which observers are currently registered in NotificationCenter, break and print its debug description:

(lldb) e print(NotificationCenter.default.debugDescription)

Each line of the output will contain (Notification) Name, Object, Observer, Options. Multiple calls to NotificationCenter.default.addObserver with some NSNotification.Name will result in multiple entries in this list.

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NB. while this might prove useful information when debugging, I would not advise to manage observers at runtime using this output.

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(source: answer based on useyourloaf)