Any way to show a view only once the app is used?

I am creating an app which requires the users to enter certain values when the app is used for the first time. A settings screen with 4 UITextFields and a UIPicker. This settings view can be accessed later using a button from the mainscreen. Somebody please su开发者_开发百科ggest some ideas

Thanks

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Use the NSUserDefaults and set a BOOL or a NSDate to indicate that you app has been used for the first time.

[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstUse"]