How to make the UIKeyboard black?

Question

I've seen this SO question here: Can I tint (black) a UIKeyboard? If so, how?, where the top answer suggests that you can hack around but doing so may get your app rejected by Apple. This must not be true, as I've seen other iPhone applications (a major one being Clear) that have a black UIKeyboard. How is it done?

Here's a screenshot of Clear for reference:

Answer 1

Try this out

   [(UITextField *)mySubView setKeyboardAppearance:UIKeyboardAppearanceAlert];

or just adding setKeyboardAppearance:UIKeyboardAppearanceAlert appropriately depending on how you have this set up!