redux与react-redux(原名:react相关学习)
一月 11, 2021
写在前面
创建时间:2020-09-07 10:56:40
// 一看就会,一问就傻(* ̄m ̄),越学越没劲,或许我是真的不喜欢编程吧
参考资料
- https://www.jianshu.com/p/2eb7a12223ad
- [https://segmentfault.com/a/1190000015367584
- https://www.redux.org.cn/
- https://react-redux.js.org/
正篇
redux简单思想
一个应用只有一个store,通过store.getState()获取state,一个state对应一个view,view通过store.dispatch() 向store发出Action(其中type唯一),之后会调用reducer更新store,通过设置store.subscribe()监听改变state
其实这与订阅-发布模式很像
react-redux
react-redux提供了一个connect()来将组件与store连接,同时,这个方法有两个单数
mapStateToProps:每次存储状态更改时调用。它接收整个存储状态,并应返回此组件需要的数据对象。mapDispatchToProps:此参数可以是函数或对象。- If it’s a function, it will be called once on component creation. It will receive
dispatchas an argument, and should return an object full of functions that usedispatchto dispatch actions. - If it’s an object full of action creators, each action creator will be turned into a prop function that automatically dispatches its action when called. Note: We recommend using this “object shorthand” form.
- If it’s a function, it will be called once on component creation. It will receive
假装这里一个栗子,当然这里例子并不好,之后会修改下
1 | // back |
react-redux与Hook
好吧,这其实才是我想讲的
useSelector()
useDispatch()
未完。。。
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