Adding skins/themes to an iphone app

We've complete an app in iPhone. For the next version, we want to add skins/themes to the app. There are some good replies to similar posts that I read on stack overflow regarding this and different developers have given varying ways开发者_C百科 to solve the same. But anyone who's actually been able to accomplish this and get an acceptance from the app store, could he/she/they please post a solution to this?

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You'll need to look into singletons. I don't know all that much about them, but they are basically information that any part of the app can access.

You would need to save the user's theme preference as a singleton, then in your scenes would need to get the information about the user's preference off that singleton, and run a method that would check what the preference was load up different background/images/sprites depending on that.