How can we move sprite on shaking iphone?

i have a CCsprite object (Helicopter) and it moves on the screen where ever we touch. I want to know how to move helicopter without touch e.g开发者_开发百科 it moves upward if we move the iphone upward..

what is it called and how to do it?

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By using the Motion Event API, which provides an abstracted view of the accelerometer and gyroscope (if available):

http://developer.apple.com/library/ios/#documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/MotionEvents/MotionEvents.html