为什么试图了解代表们感觉就像试图了解宇宙的本质？ [英] Why does trying to understand delegates feel like trying to understand the nature of the universe?

问题描述

我读过两本书，吨的例子。他们还让旁边没有了意义。我大概可以编写使用一些代表代码，但我不知道为什么。我是唯一一个有这个问题，还是我只是一个白痴？如果任何人都可以真正给我解释一下何时，何地，为什么我会实际使用委托，我将永远爱你。

I've read two books, tons of examples. They still make next to no sense to me. I could probably write some code that uses delegates, but I have no idea why. Am I the only one with this problem, or am I just an idiot? If anyone can actually explain to me when, where, and why I would actually use a delegate, I'll love you forever.

推荐答案

代表仅仅是通过周围的函数在一个变量的方式。

Delegates are just a way to pass around a function in a variable.

您传递一个委托函数做一个回调。这样做异步IO时一样，您通过委派功能，当数据被读出硬盘将被调用（你曾与委托参数写的函数）。

You pass a delegated function to do a callback. Such as when doing asynchronous IO, you pass a delegated function (a function you have written with the delegate parameter) that will be called when the data has been read off the disk.

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