Rebuilding from Scratch

Sometimes it's helpful to close out the simulator program and restart it by running your app again. The default background should be white, so if you're getting a black background, it's either something wrong with one of your views, or it's Simulator acting weird. I would try commenting out the code in your App Delegate file that loads a root view controller (or adds a view to the window, whatever the case may be). See if the view is white. If not, then the simulator is acting weird. If it actually is white, try to figure out which view is causing the black screen by commenting out lines of code.