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Learning iOS Development: A Hands-on Guide to the Fundamentals of iOS Programming by Erica Sadun, Rod Strougo, Maurice Sharp

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Vibration Support and Proximity

Vibration, which adds tactile feedback to many games, is limited to iPhones. The iPad and iPod touch do not offer vibration support. Nor do they include the proximity sensor that blanks the screen when holding an iPhone against your ear during calls. The UIDevice class offers direct access to the current state of the proximity sensor.

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