在提交表单时进行React Router v4重定向

Question

全新的响应，在“登录”页面上单击“提交”后尝试重定向到“主页”。尝试遵循React Router教程。

当我单击表单上的提交按钮并在控制台上记录状态和fakeAuth.isAuthenticated时，它们都返回true。但是，重定向不会触发。

Login.js

class Login extends Component {
    constructor(props) {
        super(props);
        this.state = {
            portalId: "",
            password: "",
            redirectToReferrer: false
        }

        this.handleSubmit = this.handleSubmit.bind(this);
    }


    handleSubmit(e) {
        fakeAuth.authenticate(() => {
            this.setState({
                portalId: this.refs.portalId.value,
                password: this.refs.password.value,
                redirectToReferrer: true
            })
        })
        e.preventDefault();
    }


    render() {
        const redirectToReferrer = this.state.redirectToReferrer;
        if (redirectToReferrer === true) {
            <Redirect to="/home" />
        }

Routes.js

export const fakeAuth = {
    isAuthenticated: false,
    authenticate(cb) {
        this.isAuthenticated = true
        setTimeout(cb, 100)
    },
    signout(cb) {
        this.isAuthenticated = false
        setTimeout(cb, 100)
    }
}

const PrivateRoute = ({ component: Component, ...rest }) => (
    <Route {...rest} render={() => (
        fakeAuth.isAuthenticated === true
        ? <Component {...this.props}/>
        : <Redirect to="/" />
    )}/> 
)


export default () => (
    <BrowserRouter>
        <div>
            <Navbar />
            <Switch>
                <Route path="/" exact component={Login} />
                <Route path="/register" exact component={Register} />
                <Route path="/home" exact component={Home} />
            </Switch>
        </div>
    </BrowserRouter>
);

Answer 1

您必须返回Redirectrender方法（否则将不会被渲染，因此将不会发生重定向）：

  render() {
        const redirectToReferrer = this.state.redirectToReferrer;
        if (redirectToReferrer === true) {
            return <Redirect to="/home" />
        }
        // ... rest of render method code
   }