Event for language settings gets changed in iOS app

Question

I am developing universal iOS app with localization support. I can detect the current language used by application , but I want to know when user changes the language from

General -> International -> Language -> <new language>

I need to make some changes in user settings on backend server depending on language selection. I am searching for the event when user changes language from settings , but I didn't find anything.

Does anybody know whether it is possible to detect this event or not ?

Any kind of help is appreciated. Thanks.

Answer 1

There is no event, because changing the language will kill all running apps. So when you app is started again you can detect if the language is switched if you save the previous language some where.

Answer 2

Observe this notification key: NSCurrentLocaleDidChangeNotification

Declared in NSLocale.h