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Touches

Cocoa Touch implements direct manipulation in the simplest way possible. It sends touch events to the view you’re working with. As an iOS developer, you tell the view how to respond to each touch. You can even add gesture recognizers to your view, allowing iOS to perform basic recognition tasks to collect swipes, drags, and taps for you.

Touches convey information: where the touch took place (both the current and previous location), what phase of the touch was used (essentially mouse down, mouse moved, mouse up in the desktop application world, corresponding to finger or touch down, moved, and up in the direct manipulation world), a tap count (for example, single-tap/double-tap), and when the touch took place (through a time stamp).


  

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