I would like to make a button in order for the user to be able to connect and join a group I have created in Facebook. Is this possible with Facebook Connect? Is there a tutorial or something?
You can try checking out the newly-updated Facebook Connect SDK for iOS which has been updated for the Graph API.
You can also check out Ray Wenderlich's series on using the Graph API with the iPhone starting here.
来源：https://stackoverflow.com/questions/3498631/starting-out-with-an-application-for-facebook-connect-on-the-iphone