Having used it in several apps, the iOS SDK is an absolute mess.
Part of this is the absurd complexity of it: there are sign-on flows for going to the Facebook app if installed, or to Safari, or to an in-app web view.
Part of this is the absurd complexity of it: there are sign-on flows for going to the Facebook app if installed, or to Safari, or to an in-app web view.
This complexity seems to be an attempt to save the user from entering text in a tiny form to sign in. I don't know that it makes an actual user's life easier, but it certainly doesn't help the developer.