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tec/basic/programWithOC/defineClass/workWithObject
Objective-C 应用程序中的大部分工作是通过在对象生态系统中来回发送消息来完成的。【苹果好几次提到这句话了】这些对象中的一些是由Cocoa或Cocoa Touch提供的框架类的实例,另一些是你自己编写的类的实例。 上一章 (class.md)描述了定义类的接口和实现的语法,包括实现响应消息的方法的代码的语法。本章解释了如何向对象发送这样的消息,...
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