In the midst of researching new iPhone 4 cases that have recently arrived with noticeably different and larger rear camera holes than we’d seen in prior products, iLounge has received confirmation that Apple has recently published “Case Design Guidelines for Apple Devices,” a digital booklet laying out specifications for iPod, iPhone, and iPad cases, as well as an updated document suggesting a “keepout area” around the iPhone 4’s rear camera.
Notably, the documents now include specific recommendations for materials to be kept out of cases—such as various metals, plastics with carbon content or metallic painting—as well as guidelines for what should be specifically done for both the iPad 2 and iPhone 4, including a recommendation that iPhone 4 cases use an oversized hole to avoid flash and other interference with the distortion-sensitive rear camera. The documents also offer specific testing recommendations, such as device insertion and removal tests, colorfastness tests, call quality tests—conducted in handset, speakerphone, and headset mode—and control/port access tests to confirm that the cases will work with both headphones and dock connector cables with large plugs.
Also surprising: despite Apple’s own use of magnets in the iPad 2 and iPad Smart Covers, the Guidelines state that “case designs for Apple devices should avoid the use of magnets (for example, as closure devices) and magnetic materials.” Indeed, the company’s dimensional drawings for the iPad 2 make no mention of the magnets built into the device, leaving it up to case developers to discover the proper placement on their own. Though Apple has published dimensional drawings for its devices for years, these appear to be the first such documents released to developers since Apple created a new case-oriented lab and testing program last year.