React & Redux 实战 Reminder Pro 项目免费视频教程 #2 显示列表

src/components/App.js

import React, { Component } from 'react';
import { connect } from 'react-redux';
import { addReminder } from '../actions';

class App extends Component {
  constructor(props) {
    super(props)
    this.state = {
      text: ''
    };
  }

  addReminder() {
    this.props.addReminder(this.state.text);
  }

  renderReminders() {
    const { reminders } = this.props;
    return (
      <ul className="list-group col-sm-8 mt-2">
        {
          reminders.map(reminder => {
            return (
              <li key={ reminder.id } className="list-group-item">
                <div className="list-item">
                  <div>{ reminder.text }</div>
                  <div><em>time</em></div>
                </div>
              </li>
            );
          })
        }
      </ul>
    );
  }

  render() {
    return (
      <div className="App">
        <div className="title">Reminder Pro</div>

        <div className="form-inline">
          <div className="form-group mr-2">
            <input
              type="text"
              className="form-control"
              placeholder="I have to..."
              onChange={ (event) => this.setState({text: event.target.value}) }
            />
          </div>
          <button
            type="button"
            className="btn btn-success"
            onClick={ () => this.addReminder() }
          >
            Add Reminder
          </button>
        </div>
        { this.renderReminders() }
      </div>
    );
  }
}

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

export default connect(mapStateToProps, { addReminder })(App);

src/actions/index.js

import { ADD_REMINDER } from '../constants';

export const addReminder = (text) => {
  return {
    type: ADD_REMINDER,
    text
  }
};

src/reducers/index.js

import { ADD_REMINDER } from '../constants';

const reminder = (action) => {
  return {
    text: action.text,
    id: Math.random()
  }
};

const reminders = (state = [], action = {}) => {
  switch(action.type) {
    case ADD_REMINDER:
      return [
        ...state,
        reminder(action)
      ]
    default: return state;
  }
}

export default reminders;