css实现的环形、扇形菜单

码农公社  210.net.cn   210= 1024  10月24日一个重要的节日--码农(程序员)节

前言    

项目需要用到环形菜单,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:

2020115164645335.jpg

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。

  1. 灵活布局sectorMenuItem

  2. 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。



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