redux

react-redux 之Provider和connect

由 和自甴很熟 提交于 2020-02-03 22:57:56
react-redux：redux是数据存储和管理的工具，但是想要在react中使用redux，并不能直接将store、action和react组件建立连接，所以就需要react-redux来结合react和redux Provider：提供的是一个顶层容器的作用，实现store的上下文传递：在原应用组件上包裹一层，使原来整个应用成为Provider的子组件，接收Redux的store作为props，通过context对象传递给子孙组件上的connect connect：使用connect可以把state和dispatch绑定到react组件，使得组件可以访问到redux的数据。函数最终返回的是将state和dispatch绑定到Connect之后的新组件。React-Redux 将所有组件分成两大类：UI 组件（presentational component）和容器组件（container component） UI 组件又称为"纯组件"，即它纯函数一样，纯粹由参数决定它的值：特征 只负责 UI 的呈现，不带有任何业务逻辑 没有状态（即不使用 this.state 这个变量） 所有数据都由参数（ this.props ）提供 不使用任何 Redux 的 API 容器组件: 负责管理数据和业务逻辑，不负责 UI 的呈现 带有内部状态 使用 Redux 的 API React

react-redux的使用

由 喜你入骨 提交于 2020-02-03 22:51:14
在react-redux 框架中，给我提供了两个常用的API来配合Redux框架的使用，其实在我们的实际项目开发中，我们完全可以不用react-redux框架，但是如果使用此框架，就如虎添翼了。 我们来简单聊聊这两个常用的API connect() Provider 组件 React-Redux 将所有组件分成两大类：UI 组件（presentational component）和容器组件（container component）。 UI 组件 UI 组件有以下几个特征。 只负责 UI 的呈现，不带有任何业务逻辑 没有状态（即不使用this.state这个变量） 所有数据都由参数（this.props）提供 不使用任何 Redux 的 API 2、因为不含有状态，UI 组件又称为"纯组件"，即它跟纯函数一样，纯粹由参数决定它的值。 下面就是一个 UI 组件的例子。 const Title = value => <h1>{value}</h1>; 因为不含有状态，UI 组件又称为"纯组件"，即它纯函数一样，纯粹由参数决定它的值。 你可能会问，如果一个组件既有 UI 又有业务逻辑，那怎么办？回答是，将它拆分成下面的结构：外面是一个容器组件，里面包了一个UI 组件。前者负责与外部的通信，将数据传给后者，由后者渲染出视图。 React-Redux 规定，所有的 UI 组件都由用户提供

TypeError: Object(…) is not a function in react-redux

由 巧了我就是萌 提交于 2020-02-03 07:57:24
问题 While I was trying to createStore in react-redux I get this strange error. I don't know why as I did this before in different app there it was working fine. TypeError: Object(...) is not a function ./src/index.js C:/projects/facebook/facebook-react/src/index.js:14 11 | import rootReducer from './rootReducer'; 12 | import registerServiceWorker from './registerServiceWorker'; 13 | > 14 | const store = createStore( 15 | rootReducer, 16 | composeWithDevtools(applyMiddleware(thunk)) 17 | ); View

TypeError: Object(…) is not a function in react-redux

由 ∥☆過路亽．° 提交于 2020-02-03 07:54:37
问题 While I was trying to createStore in react-redux I get this strange error. I don't know why as I did this before in different app there it was working fine. TypeError: Object(...) is not a function ./src/index.js C:/projects/facebook/facebook-react/src/index.js:14 11 | import rootReducer from './rootReducer'; 12 | import registerServiceWorker from './registerServiceWorker'; 13 | > 14 | const store = createStore( 15 | rootReducer, 16 | composeWithDevtools(applyMiddleware(thunk)) 17 | ); View

How to add <Link> react-router per each Material-UI TableRow?

由 点点圈 提交于 2020-02-03 06:01:47
问题 How to add link per TableRow in .map? *my error is validateDOMNesting(...): cannot appear as a child of "< a >" im using react router react-router-dom how to add link in every loop of .map in Table TableRow? import React, { Fragment } from 'react' import { Paper } from 'material-ui' import Table from 'material-ui/Table'; import TableBody from 'material-ui/Table/TableBody'; import TableCell from 'material-ui/Table/TableCell'; import TableHead from 'material-ui/Table/TableHead'; import TableRow

How to add <Link> react-router per each Material-UI TableRow?

由 我的梦境 提交于 2020-02-03 06:00:29
问题 How to add link per TableRow in .map? *my error is validateDOMNesting(...): cannot appear as a child of "< a >" im using react router react-router-dom how to add link in every loop of .map in Table TableRow? import React, { Fragment } from 'react' import { Paper } from 'material-ui' import Table from 'material-ui/Table'; import TableBody from 'material-ui/Table/TableBody'; import TableCell from 'material-ui/Table/TableCell'; import TableHead from 'material-ui/Table/TableHead'; import TableRow

How to add <Link> react-router per each Material-UI TableRow?

由 你离开我真会死。 提交于 2020-02-03 05:59:45
问题 How to add link per TableRow in .map? *my error is validateDOMNesting(...): cannot appear as a child of "< a >" im using react router react-router-dom how to add link in every loop of .map in Table TableRow? import React, { Fragment } from 'react' import { Paper } from 'material-ui' import Table from 'material-ui/Table'; import TableBody from 'material-ui/Table/TableBody'; import TableCell from 'material-ui/Table/TableCell'; import TableHead from 'material-ui/Table/TableHead'; import TableRow

Where to do calculations in redux?

由 余生长醉 提交于 2020-02-02 06:08:25
问题 General question, but will include a specific example: where is the correct place to loop through state/stored data to extract calculations? So here, I need to make some calculations to display in a 'stats' sidebar that requires looping through each of an array of clients (could be a rather large number of clients) to pull out different props/values and add them all together. I did it in render just to get it to work which I know is incorrect, but does it happen still in the component and

Where to do calculations in redux?

由 烂漫一生 提交于 2020-02-02 06:08:12
问题 General question, but will include a specific example: where is the correct place to loop through state/stored data to extract calculations? So here, I need to make some calculations to display in a 'stats' sidebar that requires looping through each of an array of clients (could be a rather large number of clients) to pull out different props/values and add them all together. I did it in render just to get it to work which I know is incorrect, but does it happen still in the component and

Fish Redux系列学习之认识view、action

由 删除回忆录丶 提交于 2020-02-01 23:17:49
继续上一篇文章： Fish Redux系列学习之新建page以及认识state 如上图，现在我们学习的是 buildview 这个组件，说白了， buildView 是我们写页面的地方，跟写普通flutter的page页面一样，我们将页面都写在这里面。 View部分： view部分的代码： import 'package:fish_redux/fish_redux.dart' ; import 'package:flutter/material.dart' ; import 'package:miaoxun/utils/image_constant.dart' ; import 'package:miaoxun/utils/images_util.dart' ; import 'state.dart' ; import 'action.dart' ; Widget buildView ( SplashState state , Dispatch dispatch , ViewService viewService ) { return Scaffold ( backgroundColor : Color . fromRGBO ( 255 , 209 , 0 , 1 ) , body : Center ( child : Image . asset ( ImageUtil .
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