I hope passcode before switching off the device will be required for the next ios update.
Passcode for switching off your device.
iPhone 4S, iOS 7.1
Apple Event: May 7th at 7 am PT
Passcode for switching off your device.
iPhone 4S, iOS 7.1
Tell Apple, not us... http://www.apple.com/feedback/iphone.html
Will never happen. Don't waste your time.
There are 100's of articles on this that you can google. After reading one or two you'll see why you can't implement it.
I hope passcode before switching off the device will be required for the next ios update.