How to disable Auto Save in Xcode 4.6?

问题:

I tried to no avail

defaults write com.apple.Xcode ApplePersistence -bool NO
defaults write com.apple.dt.Xcode ApplePersistence -bool NO

The "Ask to keep changes when closing documents" option from 4.2 has been removed, https://discussions.apple.com/message/20435985#20435985.

回答1:

Turn System Preferences -> General -> "Ask to keep changes when closing documents" on.

It's still there as of OS X 10.8.3.