iOS Programming: The Big Nerd Ranch Guide

UIPopoverController

With iPad applications, you have a lot more screen space to work with. Let’s take advantage of this by presenting the UIImagePickerController in a UIPopoverController when the user taps the camera button in the detail interface.

A popover controller displays another view controller’s view in a bordered window that floats above the rest of the application’s interface. It is only available on iPads. When you create a UIPopoverController, you set this other view controller as the popover controller’s contentViewController. Popover controllers are useful when giving the user a list of choices (like picking a photo out of the photo library) or some extra information about something that is summarized on the screen. ...