IOS shares with OS X some frameworks such as Core Foundation and Foundation Kit however, its UI toolkit is Cocoa Touch rather than OS X's Cocoa, so that it provides the UIKit framework rather than the AppKit framework. Internal accelerometers are used by some applications to respond to shaking the device (one common result is the undo command) or rotating it in three dimensions (one common result is switching from portrait to landscape mode). Interaction with the OS includes gestures such as swipe, tap, pinch, and reverse pinch, all of which have specific definitions within the context of the iOS operating system and its multi-touch interface. Interface control elements consist of sliders, switches, andīuttons. The iOS user interface is based on the concept of direct manipulation, using multi-touch This article is about Apple's mobile operating system.
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