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iPhone User Interface Cookbook by Cameron Banga

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Working with a finger as a pointing device

In developing an operating system without a keyboard or physical buttons, Apple had to decide on whether or not to facilitate interaction with a stylus. Ultimately, it was decided that a stylus would create an unsatisfactory experience and the device was built from the ground up to only support human finger interaction.

There are many benefits in developing a touch only operating system. Users have no stylus to lose, the barrier between person and device is essentially torn down through direct interaction, and the device can easily be managed with only a thumb when held in the palm of a hand.

While often considered to be an afterthought, it's important to understand how our users will hold the device with ...

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