按老师的方法，实现真正的删除，如果大家发现不能删除成功和更新，一定要多仔细的多看几次，只到会和实现，再看下一节。这样才能学到老师讲的技术点，这只是我个人的观点。

// 接口  src\utils\RecordsAPI.js
import axios from "axios";

// 环境
const api = process.env.REACT_APP_RECORDS_API_URL || "http://5d712b7ad3448a001411b5c2.mockapi.io";

// 查询
export const getAll = () => axios.get(`${api}/api/v1/recores`);

// 增加
export const create = (body) => axios.post(`${api}/api/v1/recores`, body);

// 更新
export const update = (id,body) => axios.post(`${api}/api/v1/recores/${id}`, body);

// 删除
export const remove = (id) => axios.delete(`${api}/api/v1/recores/${id}`);


// .env.development.local
REACT_APP_RECORDS_API_URL=http://5d712b7ad3448a001411b5c2.mockapi.io



//src\index.js

// src\components\Records\index.js
import React, {Component} from 'react';
// import { getJSON } from 'jquery';
// import axios from 'axios';
import Record from '../Record';
import RecordForm from '../RecordForm';
import * as RecordsAPI from '../../utils/RecordsAPI';


class Records extends Component {
    state = {
        error: null,
        isLoaded: false,
        recores: []
    }

    componentDidMount() {
        // 使用 jquery

        /*getJSON('http://5d712b7ad3448a001411b5c2.mockapi.io/api/v1/recores').then((response) => {
            return this.setState({
                recores:response,
                isLoaded: true,
            });
        }, error => {
            this.setState({
                isLoaded: true,
                error: error.responseText,
            });
        });*/

        // 使用　axios

        /*axios.get('http://5d712b7ad3448a001411b5c2.mockapi.io/api/v1/recores').then((response) => {
            return this.setState({
                recores:response.data,
                isLoaded: true,
            });
        }).catch(error => {
            this.setState({
                isLoaded: true,
                error: error.message,
            });
        });*/
        this.handleRecordsAPI();

    }

    handleRecordsAPI = () => {

        RecordsAPI.getAll().then((response) => {
            return this.setState({
                recores: response.data,
                isLoaded: true,
            });
        }).catch(error => {
            this.setState({
                isLoaded: true,
                error: error.message,
            });
        });
    };


    addRecord = (record) => {
        console.log(record);
        // this.handleRecordsAPI();
        this.setState({
            error: null,
            isLoaded: true,
            recores: [
                ...this.state.recores,
                record
            ]
        })
    }

    // 更新当前的编辑值
    handleEditRecord = (record, data) => {

        console.log("record",record);

        /*
        const a = {a: 'b'};
        const b = {a: 'c'};
        const c = {
            ...a,   // 旧的值
            ...b,   // 新的值
        };

        console.log('c',c);  // 返回过来的值 c {a: "c"}
        */


        // 当前的位置
        const recordInex = this.state.recores.indexOf(record);



        const newRecords = this.state.recores.map((item, index) => {
            if(index !== recordInex){
                return item;
            }

            return {
                ...item,
                ...data
            }
        });


        this.setState({
            recores: newRecords,
        });

    }

    // 删除
    handleDeleteRecord = (record) => {
        // 当前的位置
        const recordInex = this.state.recores.indexOf(record);

        // 移出一个元素
        const newRecords = this.state.recores.filter((item, index) => index !== recordInex);
        this.setState({

        });
        this.setState({
            recores: newRecords,
        });
        console.log("删除", record);

    }

    render() {

        const {error, isLoaded, recores} = this.state;

        let recordsComponents;


        // 处理加载中....
        if (error) {
            recordsComponents = <div>Error: {error}</div>
        } else if (!isLoaded) {
            recordsComponents = <div>Loading...</div>
        } else {
            recordsComponents = (
                <table className="table table-bordered">
                    <thead>
                    <tr>
                        <th>Date</th>
                        <th>Title</th>
                        <th>Amount</th>
                        <th>Actions</th>
                    </tr>
                    </thead>
                    <tbody>
                    {
                        recores.map((record) => {
                            return (
                                <Record
                                    key={record.id}
                                    record={record}
                                    handleEditRecord={this.handleEditRecord}
                                    handleDeleteRecord={this.handleDeleteRecord}
                                />
                            );
                        })
                    }
                    </tbody>
                </table>
            );
        }


        return (
            <div>
                <h2>Record</h2>
                <RecordForm
                    handleRecordsAPI={this.handleRecordsAPI}
                    handleNewRecord={this.addRecord}
                />
                { recordsComponents }
            </div>
        );


    }
}

export default Records;


// src\components\RecordForm\index.js
import React, {Component} from 'react';
import * as RecoresAPI from '../../utils/RecordsAPI';

class RecordForm extends Component {
    state = {
        date: '',
        title: '',
        amount: '',
    }


    valid = () => {
        const {date, title, amount} = this.state;
        // 判断3个同时有值才可以点的
        return date && title && amount;
    }

    handleChange = (e) => {
        let name, obj;
        name = e.target.name;
        console.log(e.target.name); // 取name的值
        this.setState((
            obj={},
            obj[`${name}`] = e.target.value,
            obj
        ));

        // 以上等价于下面的方法
        /*this.setState({
           [name]: e.target.value
        });*/

        console.log(this.state);
    }

    handleSubmit = (e) => {
        // 阻止事件
        e.preventDefault();
        const {
            date,
            title,
            amount,
        } = this.state;
        const parmas = {
            date,
            title,
            amount: Number.parseInt(amount, 10),
        };

        RecoresAPI.create(parmas).then(response => {
            this.props.handleNewRecord(response.data);
            this.setState({
                date: '',
                title: '',
                amount: '',
            });

        }).catch(error => {
            console.log(error);
        });
    }

    render() {
        const {date, title, amount} = this.state;
        return (
            <form className="form-inline mb-3" onSubmit={this.handleSubmit}>
                <div className="form-group mr-1">
                    <input
                        type="text"
                        className="form-control"
                        placeholder="Date"
                        name="date"
                        value={date}
                        onChange={this.handleChange}
                    />
                </div>

                <div className="form-group mr-1">
                    <input
                        type="text"
                        className="form-control"
                        placeholder="Title"
                        name="title"
                        value={title}
                        onChange={this.handleChange}
                    />
                </div>

                <div className="form-group mr-1">
                    <input
                        type="text"
                        className="form-control"
                        placeholder="Amount"
                        name="amount"
                        value={amount}
                        onChange={this.handleChange}
                    />
                </div>

                <button type="submit" disabled={!this.valid()} className="btn btn-primary">Create Record</button>
            </form>
        );
    }
}

export default RecordForm;

// src\components\Record\index.js
import React, {Component} from 'react';
import PropTypes from 'prop-types';
import * as RecordsAPI from '../../utils/RecordsAPI';

class Record extends Component {
    state = {
        edit: false,
    }

    handleToggle = () => {
        const {edit} = this.state;
        this.setState({
            edit: !edit,
        })
    }


    // 更新
    handleEdit = (e) => {
        e.preventDefault();
        const {id} = this.props.record;
        const targets = this.refs;


        const record = {
            id,
            date: targets.date.value,
            title: targets.title.value,
            amount: Number.parseInt(targets.amount.value, 10),
        };

        RecordsAPI.update(id, record).then(response => {
            this.setState({edit: false});
            this.props.handleEditRecord(this.props.record, response.data);
        }).catch(error => {
            console.log(error.message);
        });
    }

    // 删除
    handleDelete = (e) => {
        e.preventDefault();
        const {id} = this.props.record;

        RecordsAPI.remove(id).then(response => {

            this.props.handleDeleteRecord(this.props.record);

        }).catch(error => {
            console.log(error)
        })
    }

    recordRow = () => {
        const {date, title, amount} = this.props.record;
        return (
            <tr>
                <td>{date}</td>
                <td>{title}</td>
                <td>{amount}</td>
                <td>
                    <button className="btn btn-info mr-1" onClick={ this.handleToggle }>Edit</button>
                    <button className="btn btn-danger" onClick={this.handleDelete}>Delete</button>
                </td>
            </tr>
        );
    }

    recordForm = () => {
        const {date, title, amount} = this.props.record;
        return (
            <tr>
                <td><input type="text" className="form-control" defaultValue={date} ref="date"/></td>
                <td><input type="text" className="form-control" defaultValue={title} ref="title"/></td>
                <td><input type="text" className="form-control" defaultValue={amount} ref="amount"/></td>

                <td>
                    <button className="btn btn-info mr-1" onClick={ this.handleEdit }>Update</button>
                    <button className="btn btn-danger" onClick={ this.handleToggle }>Cancel</button>
                </td>
            </tr>
        );
    }

    render() {
        const {edit} = this.state;
        if (edit) {
            return this.recordForm();
        } else {
            return this.recordRow();
        }
    }
}

Record.propTypes = {
    date: PropTypes.string,
    title: PropTypes.string,
    amount: PropTypes.number,
};

export default Record;