javascript - react : re render componet after button click

Question

点击提交按钮后如何刷新页面或重新渲染页面内容？我试图将 window.location.reload() (我知道不是 React 方式，this.forceUpdate() 具有相同的结果)在提交函数中(closeTicket(), openTicketSubmit()) 但 POST 请求没有得到响应

OpenTickets.js

import React from "react";
import axios from "axios";

import CardConversation from './CardConversation.jsx';

export default class PersonList extends React.Component {
    constructor(props) {
        super(props);

        this.state = {
            people: [],
            send_to_number: "",
            message_body: ""
        };

        this.closeTicket = this.closeTicket.bind(this);
        this.openTicketsReply = this.openTicketsReply.bind(this);
        this.openTicketsSubmit = this.openTicketsSubmit.bind(this);
        this.getPhoneNumberOpenTickets = this.getPhoneNumberOpenTickets.bind(this);
    }

    openTicketsReply = async e => {
        this.setState({
            [e.target.name]: e.target.value
        });
    };

    getPhoneNumberOpenTickets = async e => {
        this.setState({
            send_to_number: e
        });
    };

    openTicketsSubmit = async e => {
        e.preventDefault();
        const formData = new FormData();
        formData.set("send_to_number", this.state.send_to_number.slice(1));
        formData.set("message_body", this.state.message_body);
        axios({
            method: "post",
            url: "/outgoingsms",
            data: formData,
            headers: { "Content-Type": "multipart/form-data" }
        })
    };

    closeTicket = async e => {
        e.preventDefault();
        const formData = new FormData();
        formData.set("customernum", this.state.send_to_number.slice(1));
        axios({
            method: "post",
            url: "/closeticket",
            data: formData,
            headers: { "Content-Type": "multipart/form-data" }
        })
    };


    componentDidMount() {
        this.getPeopleData();
    }

    getPeopleData = async () => {
        try {
            const { data } = await axios.get(`/getongoing?limit=10`);
            this.setState({ people: data });
        } catch (e) {
            console.log("error: ", e);
        }
    };

    render() {
        const {
            closeTicket,
            openTicketsSubmit,
            getPhoneNumberOpenTickets,
            openTicketsReply
        } = this;

        return this.state.people.map(person => (
            <CardConversation
                person={person}
                closeTicket={closeTicket}
                openTicketsSubmit={openTicketsSubmit}
                getPhoneNumberOpenTickets={getPhoneNumberOpenTickets}
                openTicketsReply={openTicketsReply}
            />
        ));
    }
}

CardConversation.jsx

import React, { useCallback, useEffect, useState } from "react";
import { Button, Accordion, Card, Form, Row, Col } from "react-bootstrap";
import axios from "axios";

const CardConversation = ({
                              person,
                              closeTicket,
                              openTicketsSubmit,
                              getPhoneNumberOpenTickets,
                              openTicketsReply,
                          }) => {
    const [conversation, setConversation] = useState([]);

    // Handlers
    const handleSubmit = useCallback(
        e => {
            openTicketsSubmit(e);
        },
        [openTicketsSubmit]
    );

    const handleCloseTicket = useCallback(
        e => {
            closeTicket(e);
        },
        [closeTicket],
    );

    const handleClick = useCallback(() => {
        getPhoneNumberOpenTickets(person);
    },
        [person, getPhoneNumberOpenTickets]);

    const handleChange = useCallback(
        e => {
            openTicketsReply(e);
        },
        [openTicketsReply]
    );

    // Methods
    const fetchConversation = useCallback(async () => {
        try {
            const { data } = await axios.get(
                "/getconvfornum?customer_number=" + person.slice(1)
            );
            setConversation(data);
        } catch (e) {
            console.log("error: ", e);
        }
    }, [person, conversation]);

    // Effects
    useEffect(() => {
        fetchConversation(person)
    }, [person]);

    return (
        <Accordion defaultActiveKey="0">
            <Card>
                <Card.Header>
                    <Accordion.Toggle as={Button} variant="button" eventKey="0">
                        Conversation {person.indexOf(person)+1+ '    '}
                        Phone number: {person}
                    </Accordion.Toggle>
                </Card.Header>
                <Accordion.Collapse eventKey="0">
                    <Card.Body>
                        {conversation.map(message => (
                            <div>
                                <p>{message.from}</p>
                                <p>{message.body}</p>
                            </div>
                        ))}
                        <Form onSubmit={handleSubmit}>
                            <br />
                            <Form.Group as={Row} controlId="formPlaintextPassword">
                                <Col sm="10">
                                    <Form.Control
                                        type="text"
                                        placeholder="Reply"
                                        name="message_body"
                                        onChange={handleChange}
                                    />
                                </Col>
                                <Button type={"submit"}
                                        onClick={handleClick} column sm="2">
                                    Reply
                                </Button>
                            </Form.Group>
                        </Form>
                        <Form onSubmit={handleCloseTicket}>
                            <Form.Group>
                                <Col sm="11">
                                    <Button type={"submit"}
                                            onClick={handleClick} column sm="4">
                                        Close Ticket
                                    </Button>
                                </Col>
                            </Form.Group>
                        </Form>
                    </Card.Body>
                </Accordion.Collapse>
            </Card>
            <br />
        </Accordion>
    );
};

export default CardConversation;

Answer 1

重新渲染的一种简单方法是在提交 Axios 请求时更改状态变量，从而导致组件自动重新渲染。 示例:

axios({...}).then(resp => {
 this.setState({message_body:'',send_to_number:''}); // will cause to re-render
})