Chapter 13. Taps, Touches, and Gestures
The iPhone screen, with its crisp, bright, 160 pixels per inch, touch-sensitive display, is truly a thing of beauty and a masterpiece of engineering. The iPhone's multitouch screen is one of the key factors in iPhone's tremendous usability. Because the screen can detect multiple touches at the same time and track them independently, applications are able to detect a wide range of gestures, giving the user power that goes beyond the interface.
Suppose you are in the Mail application exploring your inbox, and you decide to delete an e-mail. You could tap the Edit button, select the row, and then tap the Delete button: that's three steps. Or you could just swipe your finger across the row you want to delete ...
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