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O'Reilly Platform
book
React学习手册
by
Alex Banks
,
Eve Porcello
December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
China Electric Power Press Ltd.
Content preview from
React学习手册
组件扩展
|
177
handleAction(action) {
console.log('dispatching action:', action)
this.dispatch({
source: 'VIEW_ACTION',
action
})
}
}
当
handleAction
被某个
Action
调用时,它会和该
Action
起始位置的某些数据一起被分
发。当某个
Store
被创建后,它会被
Dispatcher
登记注册并开始监听相关的
Action
。当
某个
Action
被分发后,它会按照一定的次序被处理接收,然后发送到相应的
Store
中。
Store
Store
主要用于存放应用程序逻辑和
State
数据的若干对象。
Store
和
MVC
模式中的模型
类似,不过
Store
并没有受限于在单个对象中管理数据。可能在构建
Flux
应用程序时,
存在使用单个
Store
管理多种不同数据类型的情况。
当前的
State
数据可以通过访问
Store
的属性获取。某个
Store
需要修改
State
数据的所有
操作指令都是由
Action
提供的。
Store
将会按照类别处理
Action
,并修改相关的数据。
一旦数据被修改了,该
Store
将会发出一个事件通知任何订阅了该
Store
的
View
,它们
的数据发生了变化。让我们来看一个示例:
import { EventEmitter } from 'events'
class CountdownStore extends EventEmitter ...
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Publisher Resources
ISBN: 9787519814236