reactjs – React Router 4 Regex路径 – 匹配找不到参数

我正在尝试为反应路由器4进行正则表达式模式匹配,但不幸的是this.props.match.params.id没有正确解析路径,并显示为未定义.

我希望能够访问的路径示例：

> / gps
> / gps / air
> / gps / a0b6dc45-11a1-42c5-afdb-a62822d109dc
> / gps / air / a0b6dc45-11a1-42c5-afdb-a62822d109dc

我的组件：

import React from "react";
import PropTypes from "prop-types";
import { withRouter, } from "react-router";
import { Switch, Route } from "react-router-dom";

class Foo extends React.Component {
    render(){
        console.log(this.props.match);
        return <div>Match: {this.props.match.params.id}</div>
    }
} 

const industryRegex = "(air|motor|ship)";
const guidRegex = "([0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12})?"; // Note the questionmark ? at the end

const pathId =            `/gps/:id${guidRegex}`;
const pathIndustry =      `/gps/:industryType${industryRegex}`;
const pathIndustryAndId = `/gps/:industryType${industryRegex}/:id${guidRegex}`;

console.log(pathId);
console.log(pathIndustry);
console.log(pathIndustryAndId);

const AppComponent = ({...props}) => {
    return (
        <Switch>
            <Route path={pathId}                     component={Foo} />
            <Route path={pathIndustry}               component={Foo} />
            <Route path={pathIndustryAndId}          component={Foo} />
        </Switch>
    )
};

export default withRouter(AppComponent);

尝试以下路径/ gps / a0b6dc45-11a1-42c5-afdb-a62822d109dc会导致this.props.match.params.id未定义.

任何帮助非常感谢

您在行业正则表达式末尾错过了一个问号,将其标记为通过案例3的选项.否则,您的正则表达式适用于您所述的所有案例.

固定的正则表达式应如下所示：/ gps /：industryType(air | motor | ship)？/：id([0-9a-f] {8} – [0-9a-f] {4} – [1- 5] [0-9A-F] {3} – [89ab] [0-9A-F] {3} – [0-9A-F] {12})？

专业提示：对于react路由器4,您可以在此处测试正则表达式并验证所有用例：https://pshrmn.github.io/route-tester/