At earl year, I got a same issue and I am testing with HACKBOOK example and as same as your issue. I can run well in simulator but when I tested in device I got same problum and then I just put that bellow code and working great.
Go to facebook. M class in your SDK find this method.
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.