How do I get a list of languages for which a Localizable.strings file exists?

I need to restrict a choice of languages to the ones that our app supports. How do I programmatically get a list of languages开发者_StackOverflow中文版 for which a Localizable.strings file exists?

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As per this iOS documentation page you can can call the preferredLocalizations method to get the list of localizations in your bundle.

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Open your project and look for the Localizable.strings If it supports multiple languages, it will appear as a dropdown item:

There you have them all.