官术网_书友最值得收藏!

  • Practical Mobile Forensics
  • Rohit Tamma Oleg Skulkin Heather Mahalik Satish Bommisetty
  • 307字
  • 2021-06-24 16:39:05

The iOS architecture

iOS is an intermediary between the device hardware components and the applications on the screen. The applications don't interact with the underlying hardware directly. Instead, they do it through a well-defined system interface that protects them from hardware changes. This abstraction makes it easy to build applications that work on devices with different hardware capabilities.

The iOS architecture consists of four layers: the Cocoa Touch layer, the Media layer, the Core Services layer, and the Core OS layer. Each layer consists of several frameworks that help to build an application, as illustrated in the following diagram:

The iOS layers

These layers can be described as follows:

  • Cocoa Touch: This layer contains the key frameworks required to develop the visual interface for iOS applications. Frameworks in this layer provide the basic application infrastructure and support key technologies, such as touch-based input, multitasking, and many high-level system services.

  • Media: This layer provides the graphics, audio, and video frameworks to create the best multimedia experience available on a mobile device. The technologies in this layer help developers to build applications that look and sound great.

  • Core Services: This layer provides the fundamental system services that are required for the applications. Not all of these services are used by developers, though many parts of the system are built on top of them. This layer contains technologies that enable support for location services, iCloud, and social media.

  • Core OS: This layer is the base layer and sits directly on top of the device hardware. This layer deals with low-level functionalities and provides services such as networking (Berkeley Software Distribution (BSD) sockets), memory management, threading (Portable Operating System Interface (POSIX) threads), filesystem handling, external accessories access, and Inter Process Communication (IPC).

Now that we have learned about the iOS architecture, let's have a look at iOS security.

主站蜘蛛池模板: 界首市| 松溪县| 大厂| 石景山区| 金湖县| 木兰县| 大英县| 平潭县| 乾安县| 离岛区| 合肥市| 庆阳市| 砀山县| 小金县| 涪陵区| 贺兰县| 新蔡县| 霍城县| 钟祥市| 连山| 交城县| 西安市| 密山市| 桑植县| 保定市| 嘉祥县| 田东县| 新丰县| 斗六市| 延边| 横山县| 顺平县| 太原市| 黄梅县| 安丘市| 双流县| 吐鲁番市| 廊坊市| 顺平县| 丽江市| 常德市|