High DesignResolution and iOS simulator display bug.

Hi all,
I’m currently building a game with cocos2dx 3.0 alpha0. At the moment I’m building for iOS.
I tried to set the “DesignResolution” at 1280 by 1920 (Which is double the iPhone 4 resolution) so I can have the graphics look good on iPad retina. Everything works fine on the devices but when I try to run it on the iPhone and iPad simulator I get three quarters of the screen rendered black. This happens whether it’s iPhone, iPad or iPad retina simulator. When I tried to reduce the DesignResolution to 640 by 960 it shows fine on the simulator.
Does anyone have any information on this issue? How can I fix this rendering issue on the simulator?

Hi everyone,
Turns out there was no problem, I had simply set positions of things during the accelerometers onAcceleration function. The simulator doesn’t call this hence there was no display of a lot of things.