If a notification of iOS system is not documented, can I listen on it?

If a notification of iOS system(say batterylevel change, etc) is not documented, can I listen on it? Will the app rejected by appstore?

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Penggeqiang
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sorry, I used a invalid example.


This one is not documented: _UIApplicationDidRemoveDeactivationReasonNotification

And all the notification names start with underscore is not documented, can we use them?

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Penggeqiang
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Only app review can say for sure, but the App Store Review Guidelines do say:


2.5.1 Apps may only use public APIs and must run on the currently shipping OS.
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TheCD
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