iOS SDK

参考：
iOS SDK wiki

07年开始 1.x 2017年11.x 一年一个版本 十年了

SDK contents：

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1. IOS SDK

iOS官方参考文档 IOS Developer Library，所有系统SDK及Framework都可从此查看到；要熟悉SDK跟Framework多看官方。

Cocoa Touch

遵守MVC结构设计

Main features:

• UIKit
• Auto Layout
• Storyboards
• Gesture Recognisers
• Standard System View Controllers
• Others

Frameworks:

Foundation Kit/UIKit/MapKit/Address Book UI/EventKit/Message UI/Notification Center/PushKit/iAd/GameKit

Media

• audio/video/image
• Quartz(Core Graphics)/Core Animation/OpenGL
  CGContext: Core Graphic Context;

Core Services

• Networking
• Embedded SQLite database
• Core Location
• Threads
• CoreMotion 重力加速度/陀螺仪 Reference

Core OS / IOS kernel

• TCP/IP and Sockets
• Power management
• File system
• Security