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I’d like to build a web application which allow iPhone users to save a short memo as a todo list on the web server. The user must logon on Facebook on the iPhone before submitting a memo.
On the server side, how can I tell whether the iPhone user has logon on Facebook or not?
In a native app, FBConnect can be used to establish trust between the app and Facebook. (FBConnect calls an fbDidLogin delegate method).
It’s up to you to establish trust between your iPhone app and your web service, but once you have, the app can report the FB login state along with it’s requests.