How to detect when the control/notification center appears?

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In my iOS app I want to know when the control or the notification center appears. Is there a notification specifically for this available? The notifications for applicationWillResignActive and applicationDidBecomeActive do not help in my situation because they are not specific enough.

asked 1 min ago

Fair Dinkum Thinkum

4,226

How to detect when the control/notification center appears?