GIKPopoverBackgroundView - freely customize Popovers | PandaLit |

GIKPopoverBackgroundView is a UIPopoverBackgroundView subclass which uses images similar to those found in UIKit to customise the background of a UIPopoverController.

Unlike most other third-party implementations, GIKPopoverBackgroundView doesn't use separate background and arrow images, so the appearance is seamless for all orientations.

Via Vincent Demay