如何让redux将联系人添加到我的联系人状态对象？

const initialState = {
  contacts: []
};

const contactReducer = (state = initialState, action) => {
  switch (action.type) {
    case 'ADD_CONTACT':
      return {
        ...state,
        contacts: [...state.contacts, action.payload]
      };
    default:
      return state;
  }
};

const addContact = (contact) => {
  return {
    type: 'ADD_CONTACT',
    payload: contact
  };
};

import { connect } from 'react-redux';
import { addContact } from './actions';

class ContactForm extends React.Component {
  // ...组件的其他代码

  handleSubmit = (event) => {
    event.preventDefault();
    const { name, email } = this.state;
    const newContact = { name, email };
    this.props.addContact(newContact);
  }

  render() {
    // ...组件的渲染代码
  }
}

const mapDispatchToProps = {
  addContact
};

export default connect(null, mapDispatchToProps)(ContactForm);