Dispatch 不是函数 useContext/useReducer React hooks

Question

我的 Home.js 组件似乎根本看不到 dispatch 函数。大家知道为什么吗？我对 redux 中的 redux 样式状态管理内容有点陌生。

我不断收到错误“TypeError：dispatch is not a function”

应用程序.js

import React from 'react';
import { HashRouter, Route } from 'react-router-dom';

import Home from './pages/Home';
import Start from './pages/Start';
import Result from './pages/Result';

import RPSContextProvider from './contexts/RPSContext';

const App = () => {
    return (
        <HashRouter>
            <RPSContextProvider>
                <Route exact path="/" component={Home} />
                <Route path="/start" component={Start} />
                <Route path="/result" component={Result} />
            </RPSContextProvider>
        </HashRouter>
    );
};

export default App;

主页.js

import React, { useRef, useContext } from 'react';
import { RPSContext } from '../contexts/RPSContext';
import './home.css';

const Home = (props) => {
    const { state, dispatch } = useContext(RPSContext);
    const playerNameEntry = useRef();

    const handleClick = () => {
        if (!isStringEmpty(playerNameEntry.current.value)) {
            dispatch({ type: 'SET_NAME', state: playerNameEntry.current.value });
            props.history.push({
                pathname: '/start'
            });
            console.log(dispatch);
        }
    };

    const isStringEmpty = (string) => string.trim().length === 0;

    return (
        <div className="app-container">
            <h1>
                You dare battle me at
                <br />
                Rock, Paper, Scissors?
                <br />
                You got no chance, kid!
            </h1>
            <p>What's your name, ya chancer?</p>
            <input type="text" onKeyPress={(e) => handleKeyPress(e)} ref={playerNameEntry} />
            <button onClick={handleClick}>Start</button>
        </div>
    );
};

export default Home;

RPSContext.js

import React, { createContext, useReducer } from 'react';
import { RPSReducer } from '../reducers/RPSReducer';

export const RPSContext = createContext();

const RPSContextProvider = (props) => {
    const [ state, dispatch ] = useReducer(RPSReducer, { playerName: '' });

    return <RPSContext.Provider value={{ state, dispatch }}>{props.children}</RPSContext.Provider>;
};

export default RPSContextProvider;

RPSReducer.js

export const RPSReducer = (state, action) => {
    switch (action.type) {
        case 'SET_NAME':
            return { playerName: action };
        default:
            throw new Error();
    }
};

基本上作为第一步，我只想设置条目的名称。我知道这只是我正在做的事情的大量代码，但只是想尝试 useReducer 和 useContext 以便我可以在 React 中学习所有这些新东西。

Answer 1

我通过添加解决了这个问题

    switch (action.type) {
        case 'SET_NAME':
            return { ...state, playerName: action.payload }

在我的减速器中，在 Home.js 中将我的状态键更改为有效负载。不能 100% 确定它具有相同的名称是否会影响任何内容，但将其命名为有效负载就不那么令人困惑了。

    const handleClick = () => {
        if (!isStringEmpty(playerNameEntry.current.value)) {
            dispatch({ type: 'SET_NAME', payload: playerNameEntry.current.value });