IOS SDK综述
前言：
这篇文章除了架构没有太多的东西，但是我一直觉得知道SDK能提供什么东西对IOS的整体架构把握很重要，会少走很多弯路。
一 几点理解
官方关于IOS的文档
https://developer.apple.com/devcenter/ios/index.action
这里要提到的是，Apple的文档是深入理解IOS开发的根源，所以，一定要能够看懂文档。另外，Apple建议，能使用上层的库来实现就尽量使用上层的，SDK提供的上层库的效率往往比较高。（毕竟Cocoa经历过那么多年的历史，经过无数锤炼，顺着它来总没错）
本文主要来自官网文档
链接
二 IOS系统的分层
分层用一幅图来看
IOS的底层是基于Unix系统的，所以很多Unix系统的特征，IOS都有。
Cocoa Touch Layer
|
App Extensions |
HandOff |
|
Document Picker |
Air Drop |
|
Text Kit |
UIKit Dynamics |
|
Multitasking |
Auto Layout |
|
Stroyboard |
UI State Preservation |
|
App Push Notification |
Local Notification |
|
Gesture Recongnizer |
Standard System View Controller |
|
Address Book UI FrameWork |
EventKit UI FrameWork |
|
GameKit FrameWork |
iDaFrameWork |
|
MapKit FrameWork |
Message UI FrameWork |
|
PushKit FrameWork |
Twitter FrameWork |
|
UIKit FrameWork |
|
Media Layer
Graphics Technology
|
UIKit graphics(BeizerPath) |
Core Graphics FrameWork |
|
Core Animation |
Core Image |
|
OpenGL ES and GLKit |
MEtal |
|
Text Kit and Core Text |
Image I/O |
|
Photos Library |
|
Audio Technology
|
Media Player Framework |
AV Foundation |
|
Open AL |
Core Audio |
Video Technology
|
UIImagePickerController |
AVKit |
|
AV Foundation |
Core Media |
Media Layer FrameWork
|
Assets Library Framework |
AV Foundation Framework |
|
AVKit Framewrok |
Core Audio |
|
Core Audio Framework |
Core Graphics Framework |
|
Core Image Framework |
Core Text Framework |
|
Core Video Framework |
Game Controller Framework |
|
GLKit Framework |
Image I/O Framework |
|
Media Accessibility Framework |
Media Player Framework |
|
Metal Framework |
OpenAL Framework |
|
OpenGL ES Framework |
Photos Framework |
|
Photos UI Framework |
Quartz Core Framework |
|
Scene Kit FrameWork |
|
Core Servie Layer
|
iCloud Storage |
Block Objects |
|
Data Protection |
File-Sharing Support |
|
GCD |
In App purchase |
|
SQLite |
XML Support |
Core Service Framework
|
Accounts Framework |
Address Book Framework |
|
Ad support Framework |
CFNetwork Framework |
|
CloudKit Framework |
Core Data Framework |
|
Core Foundation Framwork |
Core Location Framework |
|
Core Media Framework |
Core Motion Framework |
|
Core Telephony Framework |
EventKit Framework |
|
Foundation Framework |
HealthKit Framework |
|
HomeKit Framework |
JavaScript Core Framework |
|
Mobile Core Service Framework |
Multipeer Connectivity Framework |
|
NewsstandKit Framework |
PassKit Framework |
|
Quick Look Framework |
Safari Service Framework |
|
Social Framework |
StoreKit Framework |
|
System Configuration Framework |
WebKit Framework |
Core OS Layer
|
Accelerate Framework |
Core Bluetooth Framework |
|
External Accessory Framework |
Generic Security Service Framework |
|
Local Authentication Framework |
Network Extension Framework |
|
Security Framework |
System |
|
65-Bit Support |
|
未完待续...
希望我能把大部分IOS框架学习完并完成相关的Blog。
原文地址：http://blog.csdn.net/hello_hwc/article/details/42560561
