Look out Sony and Nintendo (and poor Ouya).
IOS is a gaming powerhouse — no one would dispute that. But only for certain kinds of games, the swipers and the tilters that millions of users have downloaded. For any game that needs more granular control (platformers, shooters, sports games), the lack of a mainstream controller peripheral with a physical joystick/d-pad has constrained iOS from the deep portable experiences that are now the exclusive domain of the big gaming companies and a narrow band of Android phones.
Now the enormous iOS customer base will have access to Apple-approved controllers. At this week's WWDC, Apple announced that it would certify made-for-iPhone controllers. Apple has disseminated the following reference images to developers: One is for a standalone controller, and one is for a controller that encases the phone.
Source: toucharcade.com
Now there are reports that Apple is working with the big controller companies Logitech and MOGA on the iOS controllers.
Below is a MOGA controller designed for an Android device.