facebook - How to oauth-login a server app via the mobile client (especially iOS, Twitter, but in general too) -

facebook - How to oauth-login a server app via the mobile client (especially iOS, Twitter, but in general too) -

we have web application supports facebook , twitter login/signup via oauth (and can post fb/tw). building mobile client , naturally want people able login-signup via fb-twitter on mobile well, on ios using system-integrated accounts.

now mobile app , our server app 2 different apps, however, , if oauth correctly, we'll need have 2 authentications: 1 mobile client (system business relationship can used), 1 server (we'll have show webview it).

yet existing apps seem fine single authentication (e.g. flickr , foursquare! @ to the lowest degree 4sq seems fine ios scheme fb business relationship only. how possible?

do share consumer key/secret between mobile , web app making same app? do utilize fb-specific extension oauth do utilize auth token wherever comes making user id? something different?

old question, may help finds way here.

twitter reverse auth

ios facebook web-applications twitter oauth