iOS 6 では上記のカラーを生成するメソッドがヘッダのコメントでひそかに deprecated になっています。 UIInterface.h // Group style table view backgrounds can no longer be represented by a simple color. // If you want to have a background in your own view that looks like the table view background, // then you should create an empty table view and place it behind your content. + (UIColor *)groupTableViewBackgroundColor; // This method will be