Flutter中的Sink和Stream有什么区别？ [英] What is the difference between Sink and Stream in Flutter?

问题描述

关于Flutter的Google I / O 2018 视频解释了如何使用Dart流在Flutter应用程序中管理状态。演讲者谈到了将 Sink 用作输入流，以及将 Stream 用作输出流。 接收器和 Stream 有什么区别？我搜索了文档，但并没有说太多。

The Google I/O 2018 video about Flutter explains how to use Dart streams to manage state in a Flutter application. The speaker talked about using Sink as input stream and Stream as output stream. What is the difference between Sink and Stream? I searched the documentation but it doesn't say too much thanks.

推荐答案

A StreamSink 是 StreamConsumer ，这意味着它可以接收多个流（由 addStream ）并处理这些流发出的事件。

A StreamSink is a StreamConsumer, which means it can take several streams (added by addStream) and processes the events these streams emit.

如果它是 StreamController 的 StreamSink ，则添加的所有事件流由 StreamController 创建的流发出。

If it is the StreamSink of a StreamController then all events from the added streams are emitted by the stream created by the StreamController.

通过这种方式，您可以通过管道（转发）一个或多个流到另一个。

This way you can pipe (forward) one or more streams into another one.

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