Change color behind app on rotation

Question

When an iOS app rotates it will reveal a black background when the app is between portrait and landscape. Is it possible to change this color from the default black to white

Answer 1

You can solve the problem by adding empty general view controller with oversized bounds into your root viewController and make it the lowest in the view hierarchy:

CGFloat length = 2*MAX(rootViewController.view.bounds.size.height, rootViewController.view.bounds.size.width);

UIView *oversizedBackgroundView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, length, length)];
oversizedBackgroundView.center = vc.view.center;
oversizedBackgroundView.backgroundColor = [UIColor whiteColor];
rootViewController.view.clipsToBounds = NO;
[rootViewController.view addSubview:oversizedBackgroundView];
[rootViewController.view sendSubviewToBack:oversizedBackgroundView];

self.window.rootViewController = rootViewController;
[self.window makeKeyAndVisible];

The key point here is to set clipsToBounds to NO