Share user defaults between users

Question

I'm using user defaults to store my app data.

I have some global data that is relevant for all users on the same machine.

How can I share this data between them?

NSUserDefaults' initWithSuiteName did not work.

The only workaround I found it to write to a hidden file in the root folder, but that is too visible to the users.

Answer 1

The closest you could do is to make all of the users be members of a single group, then make a group writable file with the shared data. It could be a plist and it could even be accessed via the defaults API, assuming you don't need multiple simultaneous write access.

Answer 2

You could use CFPreferences APIs instead of NSUserDefaults , passing kCFPreferencesAnyUser as the user name parameter. However, setting defaults for all users requires admin privileges.

Answer 3

您可以使用/Users/Shared目录，如iTunes和App Store 。