title: iOS 6 native Facebook/Twitter login info
body: <p>I want to add Facebook/Twitter posting in my app using SLComposeViewController in iOS6 and I just want to add a check if the user is already logged in to Facebook/Twitter on device. So my question is that is it even necessary to add this sort of a check? Does iOS 6 handle this automatically? If I do need to add it, how can it be done? I've looked around a bit but I can't find much help on this.
  Thanks</p>