iphone - universal app ipad not showing colors -

O People, I have converted an app into a universal app, and when I try to change background color, eg ., View.backgroundColor = [UIColor blackcolor];; This will change when playing on iPhone. However, will the iPad only show gray, does anyone else get it?

You may need to set up to view the background as zero because I believe That's a default gray gradient view in the iPad that will override the background color.