When I start my game without login to GameCenter, Gamecenter login pop-up shows up in front of(top of)
the application like normal.
But if player doesn't login to GameCenter in that pop-up, and in the situation that the game needs users
to logged in to GameCenter, login pop-up doesn't show up.
Instead, pop-up stays behind the game application, so users can't see or control it.
To control the pop-up, users must go to iPhone's home screen and return to the game.
Then the pop-up shows up like...
Gamecenter login pop-up dosen't show up. (stays in the back of the application)
the application like normal.
But if player doesn't login to GameCenter in that pop-up, and in the situation that the game needs users
to logged in to GameCenter, login pop-up doesn't show up.
Instead, pop-up stays behind the game application, so users can't see or control it.
To control the pop-up, users must go to iPhone's home screen and return to the game.
Then the pop-up shows up like...
Gamecenter login pop-up dosen't show up. (stays in the back of the application)
