|This article does not cite any references or sources. (April 2008)|
Cocoa Touch provides an abstraction layer of iOS, the operating system for the iPhone, iPod Touch, and iPad. Cocoa Touch is based on the Mac OS X Cocoa API toolset and, like it, is primarily written in the Objective-C language. Cocoa Touch allows the use of hardware and features that are not found in Mac OS X computers and are thus unique to the iOS range of devices. Just like Cocoa, Cocoa Touch follows a Model-View-Controller (MVC) software architecture.
Tools for developing applications based on Cocoa Touch are included in the iOS SDK.
Cocoa Touch in relation to other iOS layers
iOS technologies can be seen as a set of layers, with Cocoa Touch at the highest level and the Core OS and iOS kernel at the bottom.
A hierarchical view of the iOS technologies can be shown as follows:
- Cocoa Touch
- Media / Application Services
- Core Services
- Core OS / iOS kernel
Some of the main features and technologies of Cocoa Touch are:
- Core Animation
- Gesture Recognizers
Cocoa Touch provides the key frameworks for developing applications on devices running iOS. Some of these key frameworks are:
- Foundation Kit Framework
- UIKit Framework (based on Application Kit)
- Game Kit Framework
- iAd Framework
- Map Kit Framework
- Apple's iOS Developer Center
- Apple Developer Center - Cocoa Touch
- Apple's iOS Reference Library - Cocoa Touch Layer