iOS 编码规范

Coding Guidelines for Cocoa

https://developer.apple.com/library/prerelease/content/documentation/Cocoa/Conceptual/CodingGuidelines/CodingGuidelines.html#//apple_ref/doc/uid/10000146-SW1

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原文地址：https://www.cnblogs.com/developer-qin/p/5852342.html