I just had this problem and believe I may have found your solution. When you create the app on facebook you must edit your app settings to allow for native ios app. The ios bundle id selected must match EXACTLY to your bundle ID in the app you are creating.
Facebook states that they check this prior to authorizing your app. Funny thing is if you remove the facebook app from the device and then try to authenticate it uses the web browser and seemingly bipasses this "security" completely. Facebook doesn't send an error message back so it was a lot of fun to track down.
I figured I'd throw this answer out there in hopes to save some future devs some trouble. I hope this helps.
I encountered the same problem. For me it was solved by unchecking the "Application does not run in background" property in the Info plist.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.