accelerometer A hardware feature that measures the acceleration of an iOS device. Often used for estimating physical orientation. See also gyroscope.
accessors See setters and getters.
action Another name for a method. See also target-action.
alert A small pop-up window with text and optional graphics that warns the user of an alert condition. Defined by the UIAlertView class.
animation Moving screen content. iOS includes various classes that can simplify animation programming.
app Short for “application,” software that runs on an iDevice.
archive A packaged version of an app that can be uploaded to the app store. Not an archive in the sense of a backup.
array A collection of data accessed through a sequential index.
Assistant A feature in the Xcode editor that automatically displays two related files at the same time.
Automatic Reference Counting (ARC) A simplified system of memory management introduced with iOS 5.
beta Unfinished software typically used for testing and development.
beta tester A user who tests beta software and reports its strengths and weaknesses.
Bluetooth A technology for sharing data between devices in close physical proximity without a physical connection. Used to share information across devices ...