问题

Question

我正在尝试将一个带有路由的网页放在一起，但在使Redux正常工作时遇到了麻烦。我的目标是向减速器发送GET响应，但现在只是测试设置，我的目标是发送true。我可以从redux存储中检索数据，但似乎无法发送数据，而且不确定可能出问题的地方。这是应该发生的事情：

在登录或注册时检查身份验证
App.js包装在提供程序中
用户可以转到Cart.js并通过单击按钮调度值true
可以导航到Menu.js，并且应该能够console.log还原器中的新值
我的问题：我似乎无法实际分发true值。一切都没有中断，但是当我进入“菜单”页面时，控制台日志显示了reducer的初始状态。
这在React Native之前对我有用。我想知道是否应该对此进行其他设置？还是身份验证搞砸了？

下面是我的代码示例：

App.js

import React, { Component } from 'react';
import {
  Route,
  BrowserRouter as Router,
  Switch,
  Redirect,
} from "react-router-dom";
import Home from './pages/Home';
import Signup from './pages/Signup';
import Login from './pages/Login';
import Menus from './pages/Menus';
import Carts from './pages/Carts';
import Orders from './pages/Orders';
import Land from './pages/Land';
import { auth } from './services/firebase';

import { Provider } from 'react-redux';
import { createStore } from 'redux';

import ourReducer from './store/reducer';
const store = createStore(ourReducer);


global.api = 'https://pitapal.metis-data.site'
//global.api = 'http://localhost:3008';


function PrivateRoute({ component: Component, authenticated, ...rest }) {
  return (
    <Route
      {...rest}
      render={(props) => authenticated === true
        ? <Component {...props} />
        : <Redirect to={{ pathname: '/login', state: { from: props.location } }} />}
    />
  )
}

function PublicRoute({ component: Component, authenticated, ...rest }) {
  return (
    <Route
      {...rest}
      render={(props) => authenticated === false
        ? <Component {...props} />
        : <Redirect to='/home' />}
    />
  )
}

class App extends Component {

  constructor() {
    super();
    this.state = {
      authenticated: false,
      loading: true,
    };
  }

  componentDidMount() {
    auth().onAuthStateChanged((user) => {
      if (user) {
        this.setState({
          authenticated: true,
          loading: false,
        });
      } else {
        this.setState({
          authenticated: false,
          loading: false,
        });
      }
    })
  }

  render() {
    return this.state.loading === true ? <h2>Loading...</h2> : (
      <Provider store={ store }>
      <Router>
        <Switch>
          <Route exact path="/" component={Signup}></Route>
          <PrivateRoute path="/home" authenticated={this.state.authenticated} component={Home}></PrivateRoute>
          <PrivateRoute path="/menus" authenticated={this.state.authenticated} component={Menus}></PrivateRoute>
          <PrivateRoute path="/carts" authenticated={this.state.authenticated} component={Carts}></PrivateRoute>
          <PrivateRoute path="/order" authenticated={this.state.authenticated} component={Orders}></PrivateRoute>
          <PublicRoute path="/signup" authenticated={this.state.authenticated} component={Signup}></PublicRoute>
          <PublicRoute path="/login" authenticated={this.state.authenticated} component={Login}></PublicRoute>
        </Switch>

      </Router>
      </Provider>
    );
  }
}

export default App;

Reducer.js

import { combineReducers } from 'redux';

const INITIAL_STATE = {
  carts: 'nothing'
};

const ourReducer = (state = INITIAL_STATE, action) => {
  const newState = { ...state };

  switch (action.type) {

    case "CARTS":
      return {
        ...state,
        carts: action.value
      }
      break;

  }
  return newState;
};


export default combineReducers({
  reducer: ourReducer,
});

Carts.js

class Carts extends Component {

    render() {
            return (
            <Container>
                <Button onClick={()=>this.props.setCart(true)}>sendToRedux</Button>
            </Container>
        );
    }
}

const mapStateToProps = (state) => {
    
    const { reducer } = state
    return { reducer }
  };
  
  const mapDispachToProps = dispatch => {
    return {
      setCart: (y) => dispatch({ type: "CARTS", value: y })
    };
  }
  

  export default connect(mapStateToProps,
    mapDispachToProps
  )(Carts);

Menu.js

 import React, { Component } from 'react';
    import Header from "../components/Header";
    import MenuItem from '../components/MenuItem';
    import classes from './menus.module.css'
    import { auth, db } from "../services/firebase";
    import { Container, Col, Row } from 'react-bootstrap';
    import { connect } from 'react-redux';
    
    class Menu extends Component {
       
    
        render() {
    
            console.log('my carts data:', this.props.reducer.carts);
           }
    
            return (
    
                <Container>
                    welcome to menu
    
                </Container>
            );
        }
    }
    
    const mapStateToProps = (state) => {
        const { reducer } = state
        return { reducer }
    };
      
    
      export default connect(mapStateToProps)(Menu);

编辑：

这是我从Redux Devtools截取的屏幕截图，这意味着派遣任务肯定发送正确了吗？

所以看来问题是，当我使用页眉组件浏览页面时，状态被重新加载，整个应用程序被重新布局。想知道是否有人知道这可能是什么。下面是我的标头组件：

Header.js

import { Link } from 'react-router-dom';
import { auth } from '../services/firebase';
//import "./header.css";
import React, { Component } from 'react'
import { Navbar, Nav, NavItem, NavDropdown, Form, FormControl, Button } from 'react-bootstrap'
// import {Link} from 'react-router-dom'
//import classes from './navbar.module.css';
import 'bootstrap/dist/css/bootstrap.min.css';


class Header extends Component {
  render() {
    return (
      <div>

        {auth().currentUser
          ? 
            <Navbar className="fixed-top" collapseOnSelect expand="lg" style={{ backgroundColor: '#485671' }} variant="dark">
              <Navbar.Brand href="#home">PitaPal</Navbar.Brand>
              <Navbar.Toggle aria-controls="responsive-navbar-nav" />
              <Navbar.Collapse id="responsive-navbar-nav">
                <Nav className="mr-auto">

                  <Nav.Link href="/login">Home</Nav.Link>
                  <Nav.Link href="/menus">Manage my Menus</Nav.Link>
                </Nav>
                <Nav>
                <Button onClick={() => auth().signOut()} variant="outline-success">Sign Out</Button>
                </Nav>
              </Navbar.Collapse>
            </Navbar>
        
          : 
            <Navbar className="fixed-top" collapseOnSelect expand="lg" style={{ backgroundColor: '#485671' }} variant="dark">
              <Navbar.Brand href="#home">PitaPal</Navbar.Brand>
              <Navbar.Toggle aria-controls="responsive-navbar-nav" />
              <Navbar.Collapse id="responsive-navbar-nav">
                <Nav className="mr-auto">
                  <Nav.Link href="/login">Login</Nav.Link>
                  <Nav.Link href="/signup">Sign Up</Nav.Link>
                </Nav>
                <Nav>
                  <Nav.Link href="contact">Contact Us</Nav.Link>
                </Nav>
              </Navbar.Collapse>
            </Navbar>
        }





      </div>
    )
  }
}

export default Header;

Answer 1

问题

您的Header使用普通锚标签向您的路线页面发布导航，这也会带来页面加载的副作用。

解决方案

使用react-router-dom Link组件进行链接。

要么指定as的{{1}}属性，要么使用Nav.Link

Link

或

<Nav.Link as={Link} to="/login">Home</Nav.Link>

<Link to="/login">Home</Link>

Reactjs-发送派遣到Reducer的问题吗？

1 个答案:

问题

解决方案