前言

项目需要用到环形菜单，初略在网上找了一下，没有找到合适的，于是自己写了一个很简单的，后续再优化。

这个组件是基于react,但是原理都一样。

展开效果如下：

实现

css(less)

@centerIconSize: 30px;.flex(@justify: flex-start, @align: center) { justify-content: @justify; align-items: @align; display: flex;}.sector-menu-wrapper { position: relative; width: @centerIconSize; margin: auto; .center-icon { .flex(center); width: @centerIconSize; height: @centerIconSize; border-radius: 50%; background: rgba(0, 0, 0, 0.3); color: white; cursor: pointer; } .sector-item { position: absolute; .flex(center); width: @centerIconSize; height: @centerIconSize; border-radius: 50%; background: rgba(0, 0, 0, 0.3); cursor: pointer; color: white; top: 0; left: 0; transition: all linear 0.5s; transform: translate(0, 0); // display: none; visibility: hidden; } .sector-list { &.sector-list-active { transition: all linear 0.5s; .sector-item { .flex(center); transition: all linear 0.5s; transform: translate(0, 0); visibility: visible; &:first-child { transform: translate(0, -@centerIconSize * 1.5); } &:nth-child(2) { transform: translate(-@centerIconSize * 1.5, 0); } &:nth-child(3) { transform: translate(0, @centerIconSize * 1.5); } } } }}

SectorMenu.js

import React from 'react';export default class SectorMenu extends React.Component { state = { direction: 'left', sectorMenuVisible: false, centerIconSize: 30, sectorItemSize: 30, } /** * 显示环形菜单 */ showSectorMenu = () => { const { sectorMenuVisible } = this.state; this.setState({ sectorMenuVisible: !sectorMenuVisible, }) } onClickSectorMenuItem = (index) => { const { sectorMenuItemFunctions } = this.props; if (!sectorMenuItemFunctions || typeof(sectorMenuItemFunctions[index]) !== 'function') { return; } sectorMenuItemFunctions[index](); } getSectorJsx = () => { const { sectorMenuItems } = this.props; if (!sectorMenuItems || !Array.isArray(sectorMenuItems) || sectorMenuItems.length === 0) { return; } const styles = {}; const { sectorMenuVisible } = this.state; return sectorMenuItems.map((item, i) => { // const styles = { // transform: translate(0, -centerIconSize * 2); // }; return (<div className={`sector-item ${sectorMenuVisible && 'sector-item-active'}`} style={styles} onClick={() => this.onClickSectorMenuItem(i)} key={i} > {item} </div>) }); } render() { const { sectorMenuVisible } = this.state; return ( <div className="sector-menu-wrapper"> <div className="center-icon" onClick={this.showSectorMenu}> { sectorMenuVisible ? 'x' : '···' } </div> <div className={`sector-list ${sectorMenuVisible && 'sector-list-active'}`}> {this.getSectorJsx()} </div> </div> ) }}

调用

<SectorMenu sectorMenuItems={['A1', 'A2', 'A3']} sectorMenuItemFunctions={[function () {console.log(0)}, function () {console.log(1)}, function () {console.log(2)}]}/>

期望

本来是想写成灵活分布，在怎么计算位置这里稍稍卡了一下，项目时间紧，改天抽空优化一下

灵活布局sectorMenuItem

灵活展示SectorMenu的位置（left,right, top, bottom...）

踩坑

过渡动画一直没有用，后来才知道是我在sector-item这个类里使用了display:none导致的，改用visibility属性就可以了。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。