Game Developer

From: http://blog.youkuaiyun.com/huangchentao/article/details/35278663 Swift and Objective-C in the Same Project在项目里交叉使用Swift和OCSwift与OC的兼容性使得你可以在项目里使用Swift+OC的方式编写应用程序，称为混合+匹配(mix and match)，用这

From: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSObject_Class/DeprecationAppendix/AppendixADeprecatedAPI.html