Where to save state in iPhone app

Question

I'm wondering where you can save the current state of the application when iCloud and iOS5 changed the operation of various parameters.

NSUserDefaults? I always got the impression that it was for the settings. Is this normal for the condition?

NSDocumentDirectory application? Isn't it syncing with iCloud? I have no particular desire to load the state of the application. It is not necessary.

Caches? This has been refined from time to time. This is not a safe place to store things.

So, what is the official, recommended place to stay in these days?

Answer 1

It seems to me that iOS developers usually use NSUserDefaults, although this means that you specify for custom settings.

For example, I recently added the popular Appirater library for my application and found that it uses NSUserDefaults to store its state (for example, how many times the application has been launched).