JavaScript基础教程 react如何使用echarts地图实现中国地图大区展示
沉沙 2018-08-09 来源 : 阅读 2972 评论 0

摘要:本篇教程介绍了JavaScript基础教程 react如何使用echarts地图实现中国地图大区展示,希望阅读本篇文章以后大家有所收获,帮助大家对JavaScript的理解更加深入。


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   日常项目中经常会用到百度地图或者echarts图标展示,今天给大家展示的是如何在react开发项目中使用百度echars的地图展示,把中国地图分为东北大区、华东大区、华南大区、华西大区、华中大区以及华北大区并用颜色标识方便识别。
    最终展示效果如下:
  
我是直接用的react官方提供的create-react-app快速构建开发环境,之后就是cnpm install --save echarts 安装echarts依赖了。
在项目中引入echarts以及中国地图数据,并引入模拟的大区地图数据。



import echarts from 'echarts';
import 'echarts/map/js/china';
import geoJson from 'echarts/map/json/china.json';
import {geoCoordMap,provienceData} from "./geo";

 

根据需要展示的地图,把地图分为map、scatter两类,在分别对两个参数进行配置修改,具体的实现是在initalECharts方法里面,并在componentDidMount生命周期中调用:
 



    componentDidMount() {
        this.initalECharts();
    }
    initalECharts() {
        const data = [
            {name: '上海', area: '华东大区', type: 'areaCenterCity'},
            {name: '深圳', area: '华南大区', type: 'areaCenterCity'},
            {name: '成都', area: '华西大区', type: 'areaCenterCity'},
            {name: '北京', area: '华北大区', type: 'areaCenterCity'},
            {name: '武汉', area: '华中大区', type: 'areaCenterCity'},
            {name: '沈阳', area: '东北大区', type: 'areaCenterCity'},
        ];
        echarts.registerMap('zhongguo', geoJson);
        for(let item of provienceData){
            if(item.area === '东北大区'){
                item.itemStyle = {
                    normal: {
                        areaColor: "#3CA2FC",
                    },
                    emphasis: {
                        areaColor: "#3CA2FC",
                    }
                }
            }else if(item.area === '华北大区'){
                item.itemStyle = {
                    normal: {
                        areaColor: "#6CAFBE",
                    },
                    emphasis: {
                        areaColor: "#6CAFBE",
                    }
                }
            }else if(item.area === '华中大区'){
                item.itemStyle = {
                    normal: {
                        areaColor: "#ADD03C",
                    },
                    emphasis: {
                        areaColor: "#ADD03C",
                    }
                }
            }else if(item.area === '华东大区'){
                item.itemStyle = {
                    normal: {
                        areaColor: "#A13614",
                    },
                    emphasis: {
                        areaColor: "#A13614",
                    }
                }
            }else if(item.area === '华西大区'){
                item.itemStyle = {
                    normal: {
                        areaColor: "#FFBA00",
                    },
                    emphasis: {
                        areaColor: "#FFBA00",
                    }
                }
            }else if(item.area === '华南大区'){
                item.itemStyle = {
                    normal: {
                        areaColor: "#FFD300",
                    },
                    emphasis: {
                        areaColor: "#FFD300",
                    }
                }
                }else if(item.area === '南海诸岛'){
                  item.itemStyle = {
                    normal: {
                      borderColor: '#fff',//区域边框颜色
                      areaColor:"#fff",//区域颜色
                    },
                    emphasis: {
                      show: false,
                      // borderColor: '#fff',
                      // areaColor:"#fff",
                    }
                  }
            }else{
                item.itemStyle = {
                    normal: {
                        areaColor: "#D9D9D9",
                    },
                    emphasis: {
                        areaColor: "#D9D9D9",
                    }
                }
            }
        }
        const myChart = echarts.init(document.getElementById('mainMap'));
        myChart.setOption({
                tooltip: {
                    show: false,       //不显示提示标签
                    formatter: '{b}',      //提示标签格式
                    backgroundColor:"#ff7f50",//提示标签背景颜色
                    textStyle:{color:"#fff"} //提示标签字体颜色
                },
                grid: {
                    left: '10%',
                    right: '10%',
                    top: '10%',
                    bottom: '10%',
                    containLabel: true
                },
                geo: {
                    map: 'china',
                    roam: false,
                    zoom: 1.2,
                    tooltip: {
                        show: false,       //不显示提示标签
                    },
                    label: {
                        normal: {
                            show: false,//显示省份标签
                            textStyle:{color:"#c71585"}//省份标签字体颜色
                        },
                        emphasis: {//对应的鼠标悬浮效果
                            show: false,
                            textStyle:{color:"#800080"}
                        }
                    },
                    itemStyle: {
                        normal: {
                            borderWidth: .5,//区域边框宽度
                            borderColor: '#fff',//区域边框颜色
                            areaColor:"#ffefd5",//区域颜色
                            label:{show:false}
                        },
                        emphasis: {
                            show: false,
                            borderWidth: .5,
                            borderColor: '#4b0082',
                            areaColor: "#ffdead",
                        }
                    },
                },
                series: [
                    {
                        type: 'scatter',
                        coordinateSystem: 'geo',
                        data: this.convertData(data),
                        symbolSize: 20,
                        symbolRotate: 35,
                        label: {
                            normal: {
                                formatter: '{b}',
                                position: 'right',
                                show: true
                            },
                            emphasis: {
                                show: false
                            }
                        },
                        tooltip: {
                            show: false,       //不显示提示标签
                            formatter: '{c}',      //提示标签格式
                            backgroundColor: "#fff",//提示标签背景颜色
                            borderColor: '#ccc',
                            borderWidth: .5,
                            textStyle:{color:"#000"} //提示标签字体颜色
                        },
                        itemStyle: {
                            normal: {
                                color: '#57c610'
                            }
                        }
                    },
                    {
                        type: 'map',
                        mapType: 'china',
                        roam: false,
                        zoom: 1.2,
                        tooltip: {
                            show: false,       //不显示提示标签
                        },
                        label: {
                            normal: {
                                show: false    //显示省份标签
                            },
                            emphasis: {
                                show: false,
                            }
                        },
                        itemStyle: {
                            normal: {
                                borderWidth: .5,      //区域边框宽度
                                borderColor: '#fff',  //区域边框颜色
                                label:{show:false}
                            },
                            emphasis: {
                                show: false,
                            }
                        },
                        // geoIndex: 0,
                        // tooltip: {show: false},
                        data: provienceData
                    }
                ],
        })
    }
    convertData(data) {
        var res = [];
        for (var i = 0; i < data.length; i++) {
            var geoCoord = geoCoordMap[data[i].name];
            if (geoCoord) {
                res.push({
                    name: data[i].name,
                    value: geoCoord.concat(data[i].area),
                    area: data[i].area,
                    type: data[i].type,
                });
            }
        }
        console.log(res);
        return res;
    }


     

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