sleep mode vs notification center open

Question

in both, 1) iPhone goes in Sleep mode 2) Open notification Center

It calls

- (void)applicationWillResignActive:(UIApplication *)application

Is there any way to identify if this method is called because device went in to sleep mode or by opening notification center?

Answer 1

There are some hacks to detect lock/unlock, but nothing official that couldn't break with a future iOS release.