如何在reactjs中从class B中获取class A中的数据

Question

这里我添加了两个类并想从一个 class 获取数据到另一个 class 但我收到这样的错误“警告：函数作为 React 无效child。如果您 return 组件而不是来自渲染，则可能会发生这种情况。或者您可能打算调用此函数而不是 return 它。"

import React, { Component } from 'react';
import DataHtml from "../datahtml";


export default class AllData extends Component {
    render(){
        return (
            <div className="row g-6 g-xl-9">
                <DataHtml />
            </div>
        );
    }
}


import React, { Component } from 'react';

class DataHtml extends Component {
    constructor(props) {
        super(props)

        this.state = {
            data: [ {"name": "demo","date": "02-02-2022"},{"name": "demo","date": "02-02-2022"}]        
            }
    }

    DataHtmlStructure = () => {
        this.state.data.map((data) => {
            return (
                <div className="col-md-6 col-xl-4 test-card">
                    <div className="card-body p-9 pt-4">
                        <div className="fs-3 fw-bolder text-dark mb-1">{data.name}</div>
                        <div className="fs-5 text-gray-600">
                            <i className="bi bi-calendar-date-fill"></i>{data.date}
                        </div>
                    </div>
                </div>
            );
        })
    }

    render() {
        return this.DataHtmlStructure;
    }
}
export default DataHtml;

Answer 1

您需要在渲染方法中调用您的函数。

    render() {
        return this.DataHtmlStructure();
    }

如何在reactjs中从class B中获取class A中的数据

How to get data in class A from class B in reactjs

rxjs

reactjs

react-native

react-hooks