什么是信号和插槽？ [英] What are signals and slots?

问题描述

有人可以用简单的术语解释信号和槽位模式吗？

Can someone explain in simple terms the "signals and slots" pattern?

推荐答案

信号和槽是一种解耦方式发送器（信号）和零个或多个接收器（时隙）。假设您有一个系统，其中包含您希望对系统感兴趣的任何其他部分提供的事件。

Signals and slots are a way of decoupling a sender (the signal) and zero or more receivers (the slots). Let's say you a system which has events that you want to make available to any other part of the system interested in those events. Rather than hard-wiring the code that generates event to the code that wants to know about those events, you would use a signals and slots pattern.

当发件人发送信号时，如果发送者发出信号，事件（通常通过调用与该事件/信号相关联的功能），该事件的所有接收器被自动调用。

When the sender signals an event (usually by calling the function associated with that event/signal) all the receivers for that event are automatically called. This allows you to connect and disconnect receivers as necessary during the lifetime of the program.

因为这个问题被标记为C ++，所以这里有一个指向 Boost.Signals 图书馆有更全面的解释。

Since this question was tagged C++, here is a link to the Boost.Signals library which has a much more thorough explanation.

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