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Threading Programming Guide
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/Introduction/Introduction.html#//apple_ref/doc/uid/10000057i
Concurrency Programming Guide
https://developer.apple.com/library/archive/documentation/General/Conceptual/ConcurrencyProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008091-CH1-SW1
Core Image Programming Guide-----https://developer.apple.com/library/content/documentation/GraphicsImaging/Conceptual/CoreImaging/ci_intro/ci_intro.html#//apple_ref/doc/uid/TP30001185
Audio Session Programming Guide
https://developer.apple.com/library/archive/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40007875
Core Animation Programming Guide
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/CoreAnimation_guide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40004514
Quartz 2D Programming Guide
https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/Introduction/Introduction.html#//apple_ref/doc/uid/TP30001066
Image I/O Programming Guide
https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/ImageIOGuide/imageio_intro/ikpg_intro.html#//apple_ref/doc/uid/TP40005462
OpenGL ES Programming Guide
https://developer.apple.com/library/archive/documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008793
Metal Programming Guide
https://developer.apple.com/library/archive/documentation/Miscellaneous/Conceptual/MetalProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40014221
Core Video Programming Guide
https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/CoreVideo/CVProg_Intro/CVProg_Intro.html#//apple_ref/doc/uid/TP40001536
App Sandbox Design Guide
https://developer.apple.com/library/archive/documentation/Security/Conceptual/AppSandboxDesignGuide/AboutAppSandbox/AboutAppSandbox.html#//apple_ref/doc/uid/TP40011183
Core Bluetooth Programming Guide
https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/AboutCoreBluetooth/Introduction.html#//apple_ref/doc/uid/TP40013257
AVFoundation Programming Guide
https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/00_Introduction.html#//apple_ref/doc/uid/TP40010188
Concepts in Objective-C Programming
https://developer.apple.com/library/archive/documentation/General/Conceptual/CocoaEncyclopedia/Toll-FreeBridgin/Toll-FreeBridgin.html#//apple_ref/doc/uid/TP40010810-CH2
Core Foundation Design Concepts
https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFDesignConcepts/CFDesignConcepts.html#//apple_ref/doc/uid/10000122i
App Programming Guide for iOS
https://developer.apple.com/library/archive/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40007072
View Controller Programming Guide for iOS
https://developer.apple.com/library/archive/featuredarticles/ViewControllerPGforiPhoneOS/index.html#//apple_ref/doc/uid/TP40007457
Predicate Programming Guide
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Predicates/AdditionalChapters/Introduction.html#//apple_ref/doc/uid/TP40001789
Bundle Programming Guide
https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFBundles/Introduction/Introduction.html#//apple_ref/doc/uid/10000123i
Kernel Programming Guide
[https://developer.apple.com/library/archive/documentation/Darwin/Conceptual/KernelProgramming/build/build.html]
Opensource
https://opensource.apple.com/tarballs
Xcode
https://developer.apple.com/library/archive/featuredarticles/XcodeConcepts/Concept-Workspace.html
Swift
https://docs.swift.org/swift-book/LanguageGuide/TheBasics.html
苹果官方 DEMO 别人整理好的链接
jianshu.com/p/f8f31bab03ec
