OC语言发展历程

基于C语言，高度兼容C语言

编译器

gcc

clang

开发工具

xcode

机器思维与抽象思维

学习资源

苹果官方文档

https://developer.apple.com/library/

Programming with Objective-C

https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/

iOS专区

https://developer.apple.com/library/ios/