无法从React组件中的props访问历史记录？

Question

我有一个名为（EnterSystem）的基本组件，在此基础上我要调用（登录）和（注册）组件。我正在使用登录组件中的{...this.props}将道具从输入系统传递到登录和注册。提交数据并通过数据库验证之后，我将使用this.props.history.push("/enterprises")将其重定向到其他组件（ListEnterprises）。但是我需要（ListEnterprise）组件中的此历史记录以将其进一步重定向到其他某个组件。但是this.props是不确定的。有人可以帮忙吗？

EnterSystem

class EnterSystem extends Component {

    constructor(props) {
        super(props);
        this.state = {
            isLogginActive: true
        };
    }

    componentDidMount() {
        //Add .right by default
        this.rightSide.classList.add("right");
    }

    changeState() {
        const { isLogginActive } = this.state;

        if (isLogginActive) {
            this.rightSide.classList.remove("right");
            this.rightSide.classList.add("left");
        } else {
            this.rightSide.classList.remove("left");
            this.rightSide.classList.add("right");
        }
        this.setState(prevState => ({ isLogginActive: !prevState.isLogginActive }));
    }

    render() {
        const { isLogginActive } = this.state;
        const current = isLogginActive ? "Register" : "Login";
        const currentActive = isLogginActive ? "login" : "register";
        return (
            <div>
                <NavigationComponent />
                <div className="Enter">
                    <div className="login">
                        <div className="container" ref={ref => (this.container = ref)} >
                            {isLogginActive && (
                                <Login {...this.props} containerRef={ref => (this.current = ref)} />
                            )}
                            {!isLogginActive && (
                                <Register {...this.props} containerRef={ref => (this.current = ref)} />
                            )}
                        </div>
                        <RightSide current={current} currentActive={currentActive} containerRef={ref => (this.rightSide = ref)} onClick={this.changeState.bind(this)} />
                    </div>
                </div>
                <FooterComponent />
            </div>
        );
    }
}

const RightSide = props => {
    return (
        <div className="right-side" ref={props.containerRef} onClick={props.onClick}>
            <div className="inner-container">
                <div className="text">{props.current}</div>
            </div>
        </div>
    );
};

export default EnterSystem; 

登录

export class Login extends Component {

    emptyCredential = {
        username: "",
        password: "",
    }

    constructor(props) {
        super(props);

        this.state = {
            isLoading: false,
            hasLoginFailed: false,
            showSuccessMessage: false,
            credential: this.emptyCredential
        }

        this.handleChange = this.handleChange.bind(this);
        this.loginClicked = this.loginClicked.bind(this);
    }


    handleChange(event) {
        const target = event.target;

        const value = target.value;
        const name = target.name;

        let updatedCredential = { ...this.state.credential };
        updatedCredential[name] = value;
        this.setState({ credential: updatedCredential });
        console.log(updatedCredential);
    }

    loginClicked(event) {
        const payload = this.state.credential;
        console.log("Printing Payload ");
        console.log(payload);
        console.log(payload.username);
        console.log(payload.password)
        AuthenticationService.executeJwtAuthenticationService(payload)
            .then(response => {
                console.log(response.data);
                AuthenticationService.registerSuccessfulLoginForJwt(payload.username, response.data.id_token);
                this.setState({ isLoading: false, hasLoginFailed: false, showSuccessMessage: true });
                this.props.history.push("/enterprises");
                // // <Redirect to={{
                // //     pathname: '/enterprises'
                // // }}
                // // />
                // <ListEnterprises name="history" historyId="this.props"  />
                // this.props.history.push({ pathname: "/enterprises" });
            })
            .catch(error => {
                console.log(error);
                this.setState({ isLoading: false, hasLoginFailed: true, showSuccessMessage: false });
            });
    }

    render() {
        return (
            <div className="base-container" ref={this.props.containerRef}>
                <div className="header">Login</div>
                <div className="content">
                    <div className="image">
                        <img src={LoginImg} />
                    </div>
                    {this.state.hasLoginFailed && <div className="alert alert-warning">Invalid Credentials</div>}
                    {this.state.showSuccessMessage && <div>Login Sucessful</div>}
                    <div className="form">
                        <div className="form-group">
                            <label htmlFor="username" for="username">Username</label>
                            <input type="text" name="username" id="username" placeholder="username" onChange={this.handleChange} />
                        </div>
                        <div className="form-group">
                            <label htmlFor="password" for="password">Password</label>
                            <input type="password" name="password" id="password" placeholder="password" onChange={this.handleChange} />
                        </div>
                    </div>
                </div>
                <div className="footer">
                    <button type="button" className="btn" onClick={this.loginClicked}>Login</button>
                </div>
            </div>
        );
    }
}

列出企业

class ListEnterprises extends Component {


    constructor(props) {
        super(props);
        this.state = {
            isLoading: true,
            enterprises: [],
            message: null,
            showFormMessage: false,
        }
        //Any method in a react component should be bound to this
        this.refreshEnterprises = this.refreshEnterprises.bind(this);
    }

    // After all the elements of the page is rendered correctly, this method is called.
    // After the markup is set on the page, this technique called by React itself to either fetch the data from An External API or perform some unique operations which need the JSX.API
    // componentDidMount() method is the perfect place, where we can call the setState() method to change the state of our application and render() the updated data loaded JSX. For example, we are going to fetch any data from an API then API call should be placed in this lifecycle method,
    // and then we get the response, we can call the setState() method and render the element with updated data.
    //React defines a component lifecycle. componentDidMount will be called as soon as the component is mounted. We are calling refreshCourses as soon as a component is mounted.
    componentDidMount() {
        this.refreshEnterprises();
    }

    _showMessage = (bool) => {
        this.setState({
            showFormMessage: bool
        });
    }

    refreshEnterprises() {
        EnterpriseService.retrieveAllEnterprises()
            .then((response) => {
                console.log(response.data);
                this.setState({ enterprises: response.data, isLoading: false });
            }).catch((error) => {
                console.log(error);
            });
    }

    render() {
        console.log("Rendering Enterprises");

        if (this.state.isLoading)
            return (<div>Loading...</div>);

        return (
            <div>
                <NavigationComponent /><br /><br />
                <h3 align="center">Here are all your Enterprises</h3><br />
                {this.state.message && <div class="alert alert-success">{this.state.message}</div>}
                <Container>
                    <Table striped bordered hover size="sm">
                        <thead>
                            <tr>
                                <th>Enterprise</th>
                                <th>Industry</th>
                                <th>Description</th>
                                <th>Update</th>
                                <th>Delete</th>
                            </tr>
                        </thead>
                        <tbody>
                            {
                                this.state.enterprises.map(
                                    enterprise =>
                                        <tr key={enterprise.id}>
                                            <td>{enterprise.enterpriseName}</td>
                                            <td>{enterprise.industry}</td>
                                            <td>{enterprise.description}</td>
                                            <td><button className="btn btn-success">Update</button></td>
                                            <td><button className="btn btn-warning">Delete</button></td>
                                        </tr>
                                )
                            }
                        </tbody>
                    </Table>
                </Container>{" "}{" "}{" "}

                <div className="container">
                    <Button color="primary" size="lg" onClick={this._showMessage.bind(null, true)}>Add Enterprise</Button>{' '}
                    <Button color="secondary" size="lg" onClick={this._showMessage.bind(null, false)}>Hide</Button>{' '}
                    {this.state.showFormMessage && (<AddEnterprise {...this.props} />)}
                </div>
                <FooterComponent />
            </div >
        );
    }
}

export default ListEnterprises;

App.js（此处定义了路由）

class App extends Component {
  state = {}
  render() {
    return (
      <Router>
        <Switch>
          <Route path="/" exact={true} component={Home} />
          <Route path="/enter" exact={true} component={EnterSystem} />
          <Route path="/enterprises"><ListEnterprises /></Route>
          // {/* <Route path='/categories' exact={true} component={Category} /> */}
          {/* <Route path='/expenses' exact={true} component={Expenses} /> */}
        </Switch>
      </Router>
    );
  }
}

export default App;

需要将道具从ListEnterprises发送到AddEnterprise。

非常感谢您的帮助。

Answer 1

向您的组件中添加withRouter HOC（高阶组件）并按如下所示使用它：

import { withRouter } from "react-router";

class ListEnterprises extends Component {/* Your component code goes here */}

export default withRouter(ListEnterprises);

Answer 2

确保将<ListEnterprises />作为Route component加载，history将自动在props中提供，并且可以使用this.props.history进行访问。

<Route path="/enterprises" component={ListEnterprises} />