what is the difference between [NSLocale preferredLanguages] and [[NSUserDefaults standardUserDefaults] objectForKey:@“AppleLanguages”]?

Question

What is the difference between [NSLocale preferredLanguages] and [[NSUserDefaults standardUserDefaults] objectForKey:@\"AppleLanguages\"]?

Answer 1

Both are meant to return the same thing, the first one is just more convenient.

The Apple Documentation says: for [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleLanguages"]

The returned array contains the languages associated with the AppleLanguages key in the user's preferred order.

The Apple Documentation says: for [NSLocale preferredLanguages]

The user's language preference order as an array of NSString objects,

Answer 2

You should use [NSLocale preferredLanguages], use [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleLanguages"] if you are supporting Mac OS X 10.4 or earlier.