当我们在iOS中使用委托和回电时？ [英] When we use delegate and Call back in iOS?

问题描述

我是iOS应用程序开发的新手，所以请向我解释一下委托和回电。当我们使用回叫和委托？

I'm very new on iOS application development so please explain me about delegate and call back. When we use use call back and delegate?

推荐答案

关于开发中心代表的大篇幅：
http://developer.apple.com/library/ ios /＃DOCUMENTATION / Cocoa / Conceptual / CocoaFundamentals / CommunicatingWithObjects / CommunicateWithObjects.html

Big piece about delegates here on the dev centre: http://developer.apple.com/library/ios/#DOCUMENTATION/Cocoa/Conceptual/CocoaFundamentals/CommunicatingWithObjects/CommunicateWithObjects.html

有一个教程应用程序使用回调/委托

There is a tutorial app using callback/delegate

http ：//brandontreb.com/objective-c-programming-tutorial-creating-a-twitter-client-part-1/

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