我有一个简单的 react hooks 应用程序 - 一个 Todos 列表 - 带有 react router v4

在待办事项列表中，当点击待办事项时，我需要：

1. 在上下文中分派当前的待办事项
2. 重定向到另一个路由（从 /todos 到 /todos/:id）

在之前基于 React 类的实现中，我可以使用 this.context.history.push 重定向到另一个路由。

我将如何使用 React Hooks 结合 React Router v4（在下面的代码中查看我在函数 editRow() 中的注释）来处理这个问题？

代码如下：

======index.js=====

import React from 'react';
import ReactDOM from 'react-dom';
import { BrowserRouter} from "react-router-dom"

import App from './App';

ReactDOM.render(
    <BrowserRouter>
        <App />
    </BrowserRouter>, document.getElementById('root'));

======main.js====

import React from 'react'
import { Switch, Route } from 'react-router-dom'
import TodosList from './todoslist'
import TodosEdit from './todosedit'

const Main = () => (
  <main>
    <Switch>
      <Route exact path="/todos" component={TodosList}/>
      <Route exact path="/todos/:id" component={TodosEdit} />
    </Switch>
  </main>
)

export default Main

======app.js=====

import React, {useContext, useReducer} from 'react';
import Main from './main'
import TodosContext from './context'
import todosReducer from './reducer'

const App = () => {
  const initialState = useContext(TodosContext);
  const [state, dispatch] = useReducer(todosReducer, initialState);
  return (
    <div>
      <TodosContext.Provider value={{state, dispatch}}>
        <Main/>
      </TodosContext.Provider>
    </div>
  )
}
export default App;

======TodosContext.js=====

import React from 'react'

const TodosContext = React.createContext({
    todos: [
        {id:1, text:'Get Grocery', complete:false},
        {id:2, text:'Excercise', complete:false},
        {id:3, text:'Drink Water', complete:true},
    ],
    currentTodo: {}
})

export default TodosContext

=====reducer.js=====

import React from 'react'

export default function reducer(state, action){
    switch(action.type){
        case "GET_TODOS":
            return {
                ...state,
                todos: action.payload
            }
        case "SET_CURRENT_TODO":
                   return {
                       ...state,
                       currentTodo: action.payload
            }
        default: 
            return state
    }
}

======Todos.js=====

import React, {useState, useContext, useEffect} from 'react';
import TodosContext from './context'

function Todos(){   
    const [todo, setTodo] = useState("")
    const {state, dispatch} = useContext(TodosContext)
    useEffect(()=>{
        if(state.currentTodo.text){
            setTodo(state.currentTodo.text)
        } else {
            setTodo("")
        }
        dispatch({
            type: "GET_TODOS",
            payload: state.todos
        })
    }, [state.currentTodo.id])

    const editRow = event =>{
        let destUrlEdit = `/todos/${event.id}`

        let obj = {}
        obj.id = event.id
        obj.text = event.text

        dispatch({type:"SET_CURRENT_TODO", payload: obj})

        //after dispatch I would like to redirect to another route to do the actual edit
        //destUrlEdit
    }
    return(
        <div>
            <h1>List of ToDos</h1>
            <h4>{title}</h4>
            <ul>
                {state.todos.map(todo => (
                    <li key={todo.id}>{todo.text} &nbsp;
                        <button onClick={()=>{
                            editRow(todo)}}>
                        </button>
                    </li>
                ))}
            </ul>
        </div>
    )
}

export default Todos;