Apply mask for orientation change

gistfile1.matlab

// Apply a mask before rotating so that things aren't shifting around weirdly
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    CALayer *mask = [[CALayer alloc] init];
    [mask setBounds:[[self view] bounds]];
    [mask setContents:(__bridge id)[[UIColor darkGrayColor] CGColor]];
    [[[self view] layer] setMask:mask];
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
    // Remove mask
    [[[self view] layer] setMask:nil];
}