IOS框架概覽 – iPhone手機開發技術文章 iPhone軟體開發教學課程

iOS是運行在iPhone、iPod Touch或iPad上的操作系統,之前叫做iPhone OS,iOS與Mac OS X有共同的基礎架構和底層技術。但iOS是根據移動設備的特點而設計的,所以和Mac OS X系統略有區別,比如對多點觸摸和加速感應器的支持。

下面來看看iOS框架簡介:
iOS 的系統架構分為四個層次:核心操作系統層(Core OS layer)、核心服務層(Core Services layer)、媒體層(Media layer)和可觸摸層(Cocoa Touch layer)。下圖展示瞭Mac OS X和iOS系統架構層次的一個對比。

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