How to temporarily change all default user settings without destroying the original?

Posted by mystify on Stack Overflow See other posts from Stack Overflow or by mystify
Published on 2010-05-25T12:30:08Z Indexed on 2010/05/25 12:31 UTC
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iphone

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nsuserdefaults

My app is based strongly on a lot of NSUserDefault keys and values.

I want to implement a temporary defaults profile which the user can activate to get a special task done easily. For this, some of the user defaults must be changed temporarily so the app adjusts it's interface appropriately.

I started to just manually change those NSUserDefaults settings, but this also destroys the user's original settings.

Is it possible to keep a backup of the user's NSUserDefault settings and restore them after the user quits the temporary mode or the app?

Like I see it, NSUserDefaults actually is just an NSMutableDictionary which is generated out of a plist file. So I would just make a deep copy of that and later assign that copy somehow back to NSUserDefaults?

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