javascript - react /归零 : redirect after loggin

Question

我是 React/redux 的新手。我有一个用于身份验证的 Redux 操作，之后我需要重定向到一个确认页面主页。我不知道如何重定向

这是我的 index.js

import React, { PropTypes } from 'react';
import { connect } from 'react-redux';
import { FormattedMessage } from 'react-intl';
import { createStructuredSelector } from 'reselect';
import {loginAction} from './actions';


export class Login extends React.PureComponent { // eslint-disable-line react/prefer-stateless-function

constructor(props) {
super(props);
this.state = {
  username: '',
  password: ''
};

// this.handleChange = this.handleChangeUsername.bind(this);
// this.handleSubmit = this.handleChangePassword.bind(this);
}

handleChangeUsername(event) {
 console.log(event.target.value);
 this.setState({username: event.target.value});
 console.log(this.state.username)
}
handleChangePassword(event) {
 this.setState({password: event.target.value});
 console.log(this.state.password)
}

 handleSubmit(event) {

this.props.dispatch(loginAction(this.state));
event.preventDefault();
}
render() {
return (
  <div>

  <div className="loginColumns animated fadeInDown">
    <div className="row">

        <div className="col-md-6">

        </div>
        <div className="col-md-6">
            <div className="ibox-content">
                <form className="m-t" role="form" onSubmit={this.handleSubmit.bind(this)}>
                    <div className="form-group">
                        <input type="email" value={this.state.username} onChange={this.handleChangeUsername.bind(this)} className="form-control" placeholder="Username" required="" />
                    </div>
                    <div className="form-group">
                        <input type="password" value={this.state.password} onChange={this.handleChangePassword.bind(this)} className="form-control" placeholder="Password" required="" />
                    </div>
                    <button type="submit" className="btn btn-primary block full-width m-b">Login</button>

                    <a href="#">
                        <small>Forgot password?</small>
                    </a>
                </form>
            </div>
        </div>
    </div>
    <hr/>
    <div className="row">
        <div className="col-md-6">
            Copyright Example Company
        </div>
        <div className="col-md-6 text-right">
           <small>© 2014-2015</small>
        </div>
    </div>
</div>

  </div>
);
}
}

Login.propTypes = {
 dispatch: PropTypes.func.isRequired,
};

const mapStateToProps = createStructuredSelector({
 // Login: makeSelectLogin(),
});

function mapDispatchToProps(dispatch) {
 return {
 dispatch,
 };
}

 export default connect(mapStateToProps, mapDispatchToProps)(Login);

Action .js

import {
  DEFAULT_ACTION,
  LOGIN_ACTION
} from './constants';

export function defaultAction() {
 return {
   type: DEFAULT_ACTION,
  };
}

export function loginAction(json) {
  return {
    type: LOGIN_ACTION,
    json
  };
}

reducer.js

import { fromJS } from 'immutable';
import {
  DEFAULT_ACTION,
  LOGIN_ACTION
} from './constants';

const initialState = fromJS({
    status: false
});

function loginReducer(state = initialState, action) {
    console.log("action", action)
  switch (action.type) {
    case DEFAULT_ACTION:
      return state;

    case LOGIN_ACTION: 
        return _testFunction(state,action.json);
        default:
      return state;
  }
}

function _testFunction(state, json) {
    if(json.username == "abcd@gmail.com" && json.password == "1234")
    return state.set("status", true)
}

export default loginReducer;

我想在成功登录后重定向/home。我该如何重定向？

Answer 1

嗯，你要做的就是这样的事情。将回调传递给您的操作。一旦操作完成，它就会工作，只需调用该回调，它将以编程方式将您重定向到您需要的 url。提交登录表单后，将带有回调函数的输入值传递给您的操作，就像这样。

  onSubmit(values) {
    this.props.loginAction(values, () => {
      this.props.history.push('/');
    });
  }

然后在您的操作中，如果您正在调用后端 API，当 promise 被解析时，确保您调用像这样传递给操作的回调函数。

  export function loginAction(values, callback) {
  const request = axios.post(`/endpoint`, values)
    .then(() => callback());

  return {
    type: LOGIN,
    payload: request
  };
}

这就是您要做的全部。您可以根据您的场景和设置对此进行细微改动。我会把它留给你作为练习。希望这可以帮助。快乐编码!