使用react router,我可以使用Link元素来创建由react route本地处理的链接。
我看到它在内部调用this.context.transitionTo(…)。
我想做导航。不是来自链接,而是来自下拉选择(例如)。我如何在代码中执行此操作?this.context是什么?
我看到了导航混合,但我可以在没有混合的情况下这样做吗?
使用react router,我可以使用Link元素来创建由react route本地处理的链接。
我看到它在内部调用this.context.transitionTo(…)。
我想做导航。不是来自链接,而是来自下拉选择(例如)。我如何在代码中执行此操作?this.context是什么?
我看到了导航混合,但我可以在没有混合的情况下这样做吗?
当前回答
您可以在React中尝试onClick事件,并使用React Router的useNavigate钩子调用函数重定向到指定位置。您可以直接在onClick处理程序中使用回调函数,而不是指定其他函数。首先需要安装react router DOM。
npm i react-router-dom
尝试以下代码
import { useNavigate } from "react-router-dom";
const Page = () => {
const navigate = useNavigate();
return (
<button onClick={() => navigate('/pagename')}>
Go To Page
</button>
);
}
其他回答
如果您使用的是更新版本的React,那么使用“useHistory”钩子是最好的选择。
这可能不是最好的方法,但。。。使用react router v4,下面的TypeScript代码可以为一些人提供一些想法。
在下面的渲染组件(例如LoginPage)中,可以访问router对象,只需调用router.transitionTo('/home')即可导航。
导航代码取自。
“react router”:“^4.0.0-2”,“反应”:“^15.3.1”,
从“react Router/BrowserRouter”导入路由器;从“react History/BrowserHistory”导入{History};从“history/createBrowserHistory”导入createHistory;consthistory=createHistory();接口MatchWithPropsInterface{component:React.component的类型,router:路由器,历史:历史,确切地?:任何图案:字符串}类MatchWithProps扩展React.Component<MatchWithPropsInterface,any>{render(){返回(<Match{…this.props}render={(matchProps)=>(React.createElement(this.props.component,this.props))}/>)}}ReactDOM.渲染(<路由器>{({路由器})=>(<div><MatchWithProps justly pattern=“/”component={LoginPage}router={router}history={history}/><MatchWithProps pattern=“/login”component={LoginPage}router={router}history={history}/><MatchWithProps pattern=“/home”component={homepage}router={router}history={history}/><缺少组件={NotFoundView}/></div>)}</路由器>,document.getElementById('app'));
在React Router v4中实现这一点时面临问题的人。
这里有一个从redux操作导航到React应用程序的工作解决方案。
文件history.js
import createHistory from 'history/createBrowserHistory'
export default createHistory()
文件App.js/Route.jsx
import { Router, Route } from 'react-router-dom'
import history from './history'
...
<Router history={history}>
<Route path="/test" component={Test}/>
</Router>
文件*另一个_File.js或redux文件
import history from './history'
history.push('/test') // This should change the URL and rerender Test component
感谢GitHub上的评论:ReactTraining问题评论
对于React路由器v4+
假设在初始渲染过程中不需要导航(可以使用<Redirect>组件),这就是我们在应用程序中所做的。
定义返回null的空路由。这将允许您访问历史对象。您需要在定义路由器的顶层执行此操作。
现在,您可以在历史上做所有可以做的事情,如history.push()、history.replace()、history.go(-1)等。!
import React from 'react';
import { HashRouter, Route } from 'react-router-dom';
let routeHistory = null;
export function navigateTo(path) {
if(routeHistory !== null) {
routeHistory.push(path);
}
}
export default function App(props) {
return (
<HashRouter hashType="noslash">
<Route
render={({ history }) => {
routeHistory = history;
return null;
}}
/>
{/* Rest of the App */}
</HashRouter>
);
}
布局/BaseLayout.jsx
import { Outlet } from "react-router-dom";
import Navbar from "../components/Navbar";
const BaseLayout = () => {
return(
<div>
<Navbar/>
<Outlet/>
</div>
)
}
export default BaseLayout
路由器/index.jsx
import { createBrowserRouter} from "react-router-dom";
import BaseLayout from "../layouts/BaseLayout";
import HomePage from "../views/HomePage";
import Menu from "../components/Menu"
import Detail from "../components/Detail";
const router = createBrowserRouter([
{
element: <BaseLayout/>,
children:[
{
path: "/",
element: <Menu />,
},
{
path: '/:id',
element: <Detail/>
}
]
},
])
export default router
存储/actionType.js
export const FETCH_DATA_FOODS = "food/setFood"
export const FETCH_DATA_FOODS_DETAILS = "food/setDetailFood"
存储/还原器/还原器.js
import { FETCH_DATA_FOODS, FETCH_DATA_FOODS_DETAILS } from "../actionType";
const initialState = {
foods:[],
detailFood:{}
};
const foodReducer = (state = initialState, action) => {
switch(action.type){
case FETCH_DATA_FOODS:
return{
...state,
foods: action.payload
}
case FETCH_DATA_FOODS_DETAILS:
return{
...state,
detailFood: action.payload
}
default:
return state
}
}
export default foodReducer
存储/actionCreator
import { FETCH_DATA_FOODS, FETCH_DATA_FOODS_DETAILS } from "./actionType";
// import { FETCH_DATA_FOODS } from "../actionType";
export const actionFoodSetFoods = (payload) => {
return {
type: FETCH_DATA_FOODS,
payload,
};
};
export const actionDetailSetDetailFood = (payload) => {
return {
type: FETCH_DATA_FOODS_DETAILS,
payload,
};
};
export const fetchDataFoods = () => {
return (dispatch, getState) => {
fetch("https://maxxkafe.foxhub.space/users")
.then((response) => {
if (!response.ok) {
throw new Error("notOk");
}
return response.json();
})
.then((data) => {
// dispatcher({
// type: "food/setFood",
// payload: data
// })
dispatch(actionFoodSetFoods(data));
});
};
};
export const fetchDetailDataFood = (id) => {
return (dispatch, getState) => {
console.log(id);
fetch(`https://maxxkafe.foxhub.space/users/${id}`)
.then((response) => {
if (!response.ok) {
throw new Error("gaOkNich");
}
console.log(response, ",,,,,,,,");
return response.json();
})
.then((data) => {
dispatch(actionDetailSetDetailFood(data));
});
};
};
stores/index.js
import { legacy_createStore as createStore, combineReducers, applyMiddleware } from 'redux'
import foodReducer from './reducers/foodReducer'
import thunk from "redux-thunk"
const rootReducer = combineReducers({
foods: foodReducer
});
const store = createStore(rootReducer, applyMiddleware(thunk));
export default store
应用程序.js
import { RouterProvider } from "react-router-dom";
import router from "./routers";
import { Provider } from "react-redux";
import store from "./stores";
const App = () => {
return (
<Provider store={store}>
<RouterProvider router={router} />
</Provider>
);
};
export default App;
组件/类别.jsx
import { useEffect, useState } from "react";
import { useSelector, useDispatch } from "react-redux";
import { Link } from "react-router-dom";
import { fetchDataCategories } from "../stores/actionCreate";
import RowCategory from "../views/rowTableCategory";
const Category = () => {
// const [categories, setCategories] = useState([])
const { categories } = useSelector((state) => state.categories);
const dispatcher = useDispatch();
useEffect(() => {
// fetch("http://localhost:3003/categories")
// .then((response) => {
// if(!response.ok){
// throw new Error ("gaOkNich")
// }
// return response.json()
// })
// .then((data) => {
// setCategories(data)
// })
dispatcher(fetchDataCategories());
}, []);
return (
<section className="mt-12">
<div className="flex mr-20 mb-4">
<Link to={'/add-Form'} className="flex ml-auto text-white bg-red-500 border-0 py-2 px-6 focus:outline-none hover:bg-red-600 rounded">
Create Category
</Link>
</div>
<div className="overflow-hidden rounded-lg border border-gray-200 shadow-md m-5">
<table className="w-full border-collapse bg-white text-left text-sm text-gray-500">
<thead className="bg-gray-50">
<tr>
<th scope="col" className="px-6 py-4 font-medium text-gray-900">
Name
</th>
<th scope="col" className="px-6 py-4 font-medium text-gray-900">
Created At
</th>
<th scope="col" className="px-6 py-4 font-medium text-gray-900">
Updated At
</th>
<th
scope="col"
className="px-6 py-4 font-medium text-gray-900"
></th>
</tr>
</thead>
<tbody className="divide-y divide-gray-100 border-t border-gray-100">
{categories.map((el) => {
return <RowCategory key={el.id} el={el} />;
})}
</tbody>
</table>
</div>
</section>
);
};
export default Category;
组件/login.jsx
import { useState } from "react";
import { useNavigate } from "react-router-dom";
import { useDispatch } from "react-redux";
import { fetchDataFoods, login } from "../stores/actionCreate";
const Login = () => {
const input = {
email: "",
password: "",
};
const [values, setValues] = useState(input);
// const [password, setPassword] = useState('')
// const {admin} = useSelector((state) => state.admin)
const dispatcher = useDispatch();
const movePage = useNavigate();
const handleChange = (event) => {
const { name, value } = event.target;
setValues({
...values,
[name]: value,
});
console.log(value);
};
const handleLogin = async (event) => {
event.preventDefault();
try {
await dispatcher(login(values));
await dispatcher(fetchDataFoods());
movePage("/home");
} catch (error) {
console.log(error);
}
};
return (
<section className="font-mono bg-white-400 mt-[10rem]">
<div className="container mx-auto">
<div className="flex justify-center px-6 my-12">
<div className="w-full xl:w-3/4 lg:w-11/12 flex justify-center">
<div className="w-full lg:w-7/12 bg-white p-5 rounded-lg lg:rounded-l-none">
<h3 className="pt-4 text-2xl text-center">Login Your Account!</h3>
<form
className="px-8 pt-6 pb-8 mb-4 bg-white rounded"
onSubmit={handleLogin}
>
<div className="mb-4">
<label
className="block mb-2 text-sm font-bold text-gray-700"
htmlFor="email"
>
Email
</label>
<input
className="w-full px-3 py-2 mb-3 text-sm leading-tight text-gray-700 border rounded shadow appearance-none focus:outline-none focus:shadow-outline"
id="email"
type="email"
name="email"
placeholder="Email"
// onChange={(event) => setValues({email: event.target.value})}
onChange={handleChange}
value={values.email.email}
/>
</div>
<div className="mb-4 md:flex md:justify-between">
<div className="mb-4 md:mr-2 md:mb-0">
<label
className="block mb-2 text-sm font-bold text-gray-700"
htmlFor="password"
>
Password
</label>
<input
className="w-full px-3 py-2 mb-3 text-sm leading-tight text-gray-700 border rounded shadow appearance-none focus:outline-none focus:shadow-outline"
id="password"
type="password"
name="password"
placeholder="Password"
onChange={handleChange}
value={values.password}
// onChange={(event) => setValues({password: event.target.value})}
/>
</div>
</div>
<div className="mb-4 md:flex md:justify-between"></div>
<div className="mb-6 text-center">
<button
className="w-full px-4 py-2 font-bold text-white bg-blue-500 rounded-full hover:bg-blue-700 focus:outline-none focus:shadow-outline"
type="submit"
>
Login
</button>
</div>
</form>
</div>
</div>
</div>
</div>
</section>
);
};
export default Login;