2分钟教你实现环形/扇形菜单基础版

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:
1.png

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 (
this.onClickSectorMenuItem(i)} key={i} > {item}
) }); } render() { const { sectorMenuVisible } = this.state; return (
{ sectorMenuVisible ? 'x' : '···' }
{this.getSectorJsx()}
) } }
调用
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
  1. 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。
最后

欢迎关注我的微信公众号:匿名程序媛
不定期分享优质原创,谢谢

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