本文旨在用最清楚的结构去实现一些组件的基本功能。希望和大家一起学习，共同进步

效果展示：

测试组件：

class Test extends Component { constructor(props) { super(props) this.state = { active:1 } } onGroupChange(value) { this.setState({ active: value }) } render() { return ( <div> <RadioGroup onChange={this.onGroupChange.bind(this)} active={this.state.active}> <Radio value={1}>使用余额支付</Radio> <Radio value={2}>使用微信支付</Radio> </RadioGroup> <Button onClick={()=>{ console.log("此时选中的是:"+this.state.active) }}>下一步</Button> </div> ) }}export default Test;

RadioGroup：

import React, { Component } from 'react';class RadioGroup extends Component { handleActiveChange(value) { console.log(`${value}被选中了`) this.props.onChange(value) } render() { return ( <div> { React.Children.map(this.props.children, child => { let isActive = this.props.active === child.props.value ? true : false return React.cloneElement(child, { label: child.props.children, value: child.props.value, active: isActive, onClick: this.handleActiveChange.bind(this) }) }) } </div> ) }}export default RadioGroup;

Radio.jsx：

import React, { Component } from 'react';import "./radio.scss"class Radio extends Component { render() { return ( <div className="radio-wrap" onClick={this.props.onClick.bind(this,this.props.value)}> <div className="left"> <div className={`circle ${this.props.active === true ? 'active' : ''} `}> <div className="fork"></div> </div> <div className="label">{this.props.label}</div> </div> </div> ) }}export default Radio;

Radio.scss：

.radio-wrap { height: 40px; background-color: #ffffff; display: flex; align-items: center; padding: 0px 30px; &:active { background-color: rgb(221, 221, 221); } .left { display: inline-block; .circle { display: inline-block; height: 22px; width: 22px; box-sizing: border-box; border: 1px solid #c5c9cd; border-radius: 50%; background-color: #ffffff; position: relative; } .active{ background-color: #1eb94a; .fork { height: 12px; width: 5px; border-right: 1.5px solid #ffffff; border-bottom: 1.5px solid #ffffff; position: absolute; top: 40%; left: 50%; transform: translate(-50%, -50%) rotate(45deg); } } .label { vertical-align: top; margin-left: 10px; display: inline-block; height: 22px; line-height: 22px; font-size: 14px; } }}

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