如何在异步更改道具时重新渲染组件？

import React from 'react';

class MyComponent extends React.Component {
  render() {
    return (
      <div>
        <h1>{this.props.propName}</h1>
      </div>
    );
  }
}

// action.js
export const changePropName = (newName) => {
  return {
    type: 'CHANGE_PROP_NAME',
    payload: newName
  };
};

// reducer.js
const initialState = {
  propName: ''
};

const myReducer = (state = initialState, action) => {
  switch (action.type) {
    case 'CHANGE_PROP_NAME':
      return {
        ...state,
        propName: action.payload
      };
    default:
      return state;
  }
};

import { connect } from 'react-redux';
import { changePropName } from './action';

class MyComponent extends React.Component {
  render() {
    return (
      <div>
        <h1>{this.props.propName}</h1>
        <button onClick={() => this.props.changePropName('New Name')}>
          Change Prop Name
        </button>
      </div>
    );
  }
}

const mapStateToProps = (state) => {
  return {
    propName: state.propName
  };
};

const mapDispatchToProps = {
  changePropName
};

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