application login with facebook login

I have an app with login page, and I want to make the application to work with "facebook login".

Can any one help me?

Thanks.开发者_运维问答..

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The Facebook documentation will be your best resource.

for websites: http://developers.facebook.com/docs/guides/web/#login

for mobile: http://developers.facebook.com/docs/guides/mobile/

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There is also this framework which is provided specifically for iOS:

https://github.com/facebook/facebook-ios-sdk