react-grid-layout实现拖拽，网格布局

安装 react-grid-layout

npm install react-grid-layout

import React, { Component } from 'react';
import { Responsive, WidthProvider } from 'react-grid-layout';
import EUevent from '@/components/eventcomponent/EUevent';
import Map from '../chart/plantmap';
import EchartsBar from '../chart/BarChart';
import EchartsLine from '../chart/LineChart';
import EchartsPie from '../chart/PieChart';
import { message } from 'antd';

const ResponsiveGridLayout = WidthProvider(Responsive);
const CPhomepage_title = {
    display: 'flex',
    justifyContent: 'space-between',
    alignItems: 'center',
    lineHeight: '40px',
    padding: '0 20px',
    color: '#686868'
}
const CPhomepage_num = {
    lineHeight: '190px',
    fontSize: '50px',
    color: '#1F1F1F',
    textAlign: 'center'
}

class EUindex extends Component {
    constructor(props) {
        super(props);
        this.state = {
            isEUorCP: 'CP',
            EUlayout: [
                { i: 'g', x: 0, y: 0, w: 6, h: 10 },
                { i: 'a', x: 0, y: 0, w: 6, h: 10 },
                { i: 'b', x: 6, y: 0, w: 6, h: 10 },
                { i: 'c', x: 0, y: 10, w: 3, h: 10 },
                { i: 'd', x: 3, y: 10, w: 3, h: 10 },
                { i: 'e', x: 6, y: 10, w: 3, h: 10 },
                { i: 'f', x: 9, y: 10, w: 3, h: 10 }
            ]
        };
    }
    UNSAFE_componentWillMount() {
        this.getUserInfo()

    };
    componentWillUnmount() {
        // componentWillMount进行异步操作时且在callback中进行了setState操作时，需要在组件卸载时清除state
        this.setState = () => {
            return;
        };
    }
    getUserInfo=()=>{
        var _EUlayoutArr = JSON.parse(localStorage.getItem("EUlayoutArr"))
        if (_EUlayoutArr === null || _EUlayoutArr === undefined) {
            console.log("--null----")
            this.setState({
                EUlayout: [
                    { i: 'g', x: 0, y: 0, w: 6, h: 10 },
                    { i: 'a', x: 0, y: 0, w: 6, h: 10 },
                    { i: 'b', x: 6, y: 0, w: 6, h: 10 },
                    { i: 'c', x: 0, y: 10, w: 3, h: 10 },
                    { i: 'd', x: 3, y: 10, w: 3, h: 10 },
                    { i: 'e', x: 6, y: 10, w: 3, h: 10 },
                    { i: 'f', x: 9, y: 10, w: 3, h: 10 }
                ]
            })

        }
        else {
            console.log("youzhi----")
            this.setState({
                EUlayout: _EUlayoutArr
            })
            // this.state.EUlayout = _EUlayoutArr
        }
    }
    
    //存储拖拽移动的位置到缓存
    onLayoutChange = (layout) => {
        console.log(layout, "=----layout----")
        let EUlayoutArr = [];
        
        var index = -1;
        localStorage.removeItem('CPlayoutArr')
        layout.forEach(({ i, x, y, w, h }) => {
            index++;
            EUlayoutArr[index] = { i, x, y, w, h }
        })
        localStorage.setItem('EUlayoutArr', JSON.stringify(EUlayoutArr))
        
    }
    
    render() {

        return (
            <>
                <div className="dashboardContent">
                <ResponsiveGridLayout className="layout" layouts={{ lg: this.state.EUlayout }} rowHeight={30}
                    breakpoints={{ lg: 1200, md: 996, sm: 768, xs: 480, xxs: 0 }}
                    cols={{ lg: 12, md: 10, sm: 6, xs: 4, xxs: 2 }}
                    isResizable={false}
                    onLayoutChange={this.onLayoutChange}
                    margin={[8, 8]}
                >
                    <div className='dragcontent' key="g">
                        <div id='dragcontent_a'>设备分布</div>
                        <Map title="map" />
                    </div>
                    <div className='dragcontent' key="a">
                        
                        <div id='dragcontent_a'>最新事件列表</div>
                        <EUevent/>
                    </div>
                    <div className='dragcontent' key="b">
                        
                        <div id='dragcontent_a'>事件统计(最近七天)</div>
                        <EchartsLine />
                    </div>
                    <div className='dragcontent' key="c">
                        
                        <div id='dragcontent_a'>可用性指标</div>
                        <EchartsPie content={1} />
                    </div>
                    <div className='dragcontent' key="d">
                        
                        <div id='dragcontent_a'>环境指标</div>
                        <EchartsPie content={2} />
                    </div>
                    <div className='dragcontent' key="e">
                        
                        <div id='dragcontent_a'>可靠性指标</div>
                        <EchartsPie content={3} />
                    </div>
                    <div className='dragcontent' key="f">
                        
                        <div id='dragcontent_a'>负荷指标</div>
                        <EchartsPie content={4} />
                    </div>
                </ResponsiveGridLayout>
                </div>
            </>
        );
    }
}

export default EUindex;