Why use registerDefaults: instead of setValue: forKey :?

Question

When I configure the default settings for my application, I do the following:

1) Reading Root.plistfrom the inside Settings.bundleinto a dictionary.

2) I check if preference is set, and if not, I register the default dictionary through [NSUserDefaults standardUserDefaults] registerDefaults:]

The problem is that the default values ​​registered with help registerDefaults:do not go into persistent storage, so if the user never changes his preferences, I read my default settings and register them with NSUserDefaultsevery time the application starts.

Instead of using it, registerDefaults:I could use it setValue:forKey:, and my default setting is to persistent storage, bypassing the need to create and register a dictionary every time I start. However, Apple documentation and sample code point to registerDefaults:.

So, I'm trying to figure out when and why should I use registerDefaults:, and when / why should I use setValue:forKey:instead?

Answer 1

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