Detect if iPhone screen is on/off

Question

Is there any way to detect if an iPhone\'s screen is on or off? For example, when the phone\'s screen lock button is pressed.

I\'ve been using (void)applicationWi

Answer 1

Try this workaround. Author claims that it works well on 4.2

I have checked it on iOS 3.1 (iPhone 3G) - works well.

update: Doesn't work on iOS 5 beta 7 (iPod Touch 4G) :-(

update2: app go to background when screen locked, thus solution is kinda working on iOS 5 beta 7 :-)