造成卡顿原因 及解决方法(解释可能有误！！！)
自行通过F12进入调试窗口，可以发现点标注Marker会以div元素在dom树中渲染出来，需要占用的内存大，渲染慢且大规模的 DOM 操作（会造成重绘或重排）也会造成用户操作阻塞，从而导致卡顿。而mapv则把所有的点转成canvas绘制出来，比div方式渲染性能更好。（因为canvas是无状态的，绘制的内容不能继续引用，不需要另外的内存来保存。而dom中需要存储相应对象数据）
另外，如果对点的图标没什么要求的也可以直接使用百度地图的 海量点（PointCollection
针对点的数量很大的情况，可以使用海量点进行展示）
mapv 简介
Mapv 是一款地理信息可视化开源库，可以用来展示大量地理信息数据，点、线、面的数据，每种数据也有不同的展示类型，如直接打点、热力图、网格、聚合等方式展示数据
网站地址:http://mapv.baidu.com.
GitHub: https://github.com/huiyan-fe/mapv.
相关插件安装
npm install mapv
npm install vue-baidu-map
效果
参考代码及数据 （自行修改 直接用可能看不到效果！）
mapInfo.json 数据 格式
{
"companyTotal": 3678,
"redCompanyNum": 0,
"yellowCompanyNum": 0,
"greenCompanyNum": 3678,
"fireAlarmNum": 0,
"faultNum": 1,
"offlineNum": 1,
"companyInfo": [
{
"id": 1,
"name": "农业银行",
"contacts": "李鑫",
"phone": "18000000000",
"address": null,
"type": "三小场所",
"imgUrl": null,
"safeLevel": 1,
"lng": 113.595919,
"lat": 22.343163
},
{
"id": 2,
"name": "海洋花园",
"contacts": "张平",
"phone": "18000000000",
"address": null,
"type": "物业小区",
"imgUrl": null,
"safeLevel": 1,
"lng": 113.598704,
"lat": 22.341241
},
{
"id": 3,
"name": "民营科技大厦",
"contacts": "李梁",
"phone": "18000000000",
"address": null,
"type": "物业小区",
"imgUrl": null,
"safeLevel": 1,
"lng": 113.599638,
"lat": 22.343046
}
],
"deviceInfo": [
{
"id": 2,
"gatewayIp": "0000000102",
"monitorType": "红外烟感",
"contacts": "张杰",
"phone": "18000000000",
"address": null,
"imgUrl": "/file/image/6eab4a86gy1gde5u3csvvj20rs1aw4e1-20200703060155603.jpg",
"status": "故障",
"lng": 113.605387,
"lat": 22.360561
},
{
"id": 2,
"gatewayIp": "0000000102",
"monitorType": "红外烟感",
"contacts": "张杰",
"phone": "18000000000",
"address": null,
"imgUrl": "/file/image/6eab4a86gy1gde5u3csvvj20rs1aw4e1-20200703060155603.jpg",
"status": "离线",
"lng": 113.605387,
"lat": 22.360561
}
]
}
组件
<template>
<div id="map-area">
<div class="map-info">
<!-- <span class="info-label">网格单位: 24</span> -->
<el-checkbox-group v-model="checkList">
<el-checkbox label="green">
<img :src="iconlist[0]" class="mini-icon" />
绿色单位: {
{
mapdata.greenCompanyNum}}
</el-checkbox>
<el-checkbox label="yellow">
<img :src="iconlist[1]" class="mini-icon" />
黄色单位: {
{
mapdata.yellowCompanyNum}}
</el-checkbox>
<el-checkbox label="red">
<img :src="iconlist[2]" class="mini-icon" />
红色单位: {
{
mapdata.redCompanyNum}}
</el-checkbox>
<el-checkbox label="total" disabled>网格单位: {
{
mapdata.companyTotal}}</el-checkbox>
<br />
<el-checkbox label="fault">
<img :src="iconlist[3]" class="mini-icon" />
故障: {
{
mapdata.faultNum}}
</el-checkbox>
<el-checkbox label="fireAlarm">
<img :src="iconlist[4]" class="mini-icon" />
火警: {
{
mapdata.fireAlarmNum}}
</el-checkbox>
<el-checkbox label="offline">
<img :src="iconlist[5]" class="mini-icon" />
离线: {
{
mapdata.offlineNum}}
</el-checkbox>
</el-checkbox-group>
<!-- <span class="info-label">网格单位: {
{
mapdata.companyTotal}}</span> -->
</div>
<div class="map-top">
<button class="top-btn">实时视频</button>
</div>
<baidu-map
class="bm-view"
ak="2byzIKBDF38EDp7aCRBW0ePqMob1dZGz"
map-type="BMAP_NORMAL_MAP"
:scroll-wheel-zoom="true"
:center="center"
:zoom="zoom"
@ready="handler"
>
<bm-geolocation anchor="BMAP_ANCHOR_BOTTOM_RIGHT" :showAddressBar="true" :autoLocation="true"></bm-geolocation>
<bm-overlay
pane="labelPane"
ref="customOverlay"
:class="{sample: true, active}"
v-if="show"
@draw="draw"
@mouseover.native="active = true;show =true; "
>
<div class="map_content" @click="doSomething($event)">
<div class="map_content_box">
<div class="map_text_title">
<el-tooltip
class="item"
effect="dark"
:content="pointDetails.name"
placement="top-start"
>
<span class="max">{
{
pointDetails.name}}</span>
</el-tooltip>
<span class="more">点击查看详情</span>
</div>
<div class="map_text_body">
<ul>
<li>
<span>分行负责人：{
{
pointDetails.fuzheren}}</span>
</li>
<li>
<span>巡查工作完成情况：{
{
pointDetails.wancheng}}</span>
</li>
<li>
<span>现有警情数量：{
{
pointDetails.xianyou}}</span>
</li>
</ul>
<ul>
<li>
<span>在职人数数量：{
{
pointDetails.zaizhi}}</span>
</li>
<li>
<span>未处理隐患数：{
{
pointDetails.weichuli}}</span>
</li>
<li>
<span>智能设备掉线：{
{
pointDetails.zhineng}}</span>
</li>
</ul>
</div>
</div>
</div>
</bm-overlay>
<bm-map-type
class="anchor-cut"
:map-types="['BMAP_NORMAL_MAP', 'BMAP_HYBRID_MAP']"
anchor="BMAP_ANCHOR_BOTTOM_LEFT"
:type="'BMAP_HYBRID_MAP'"
></bm-map-type>
</baidu-map>
<canvas id="canvas"></canvas>
<!-- <div class="mask"></div> -->
</div>
</template>
<script>
/* eslint-disable */
import BaiduMap from "vue-baidu-map/components/map/Map.vue";
// 引入地图样式json文件
// import styleJson from "@/assets/json/custom_map_config";
import {
BmMarker,
BmOverlay,
BmMapType,
BmlMarkerClusterer,
BmInfoWindow,
BmGeolocation
} from "vue-baidu-map";
// import { getMapInfo } from "@/api/index";
export default {
components: {
BaiduMap,
"bm-marker": BmMarker,
"bm-overlay": BmOverlay,
BmInfoWindow,
BmlMarkerClusterer,
"bm-map-type": BmMapType,
BmGeolocation
// "bm-navigation": BmNavigation
},
data() {
return {
center: {
lng: 113.467977, lat: 22.371804 },
zoom: 5,
mapdata: {
}, // 数据
pointDetails: {
name: "xx二级分行",
fuzheren: "王行长",
wancheng: "90%",
xianyou: 2,
zaizhi: 16,
weichuli: 12,
zhineng: 0
},
pointDetail: {
}, // 详情
checkList: ["green", "red", "yellow", "fault", "fireAlarm", "offline"], // 选中的图标
fullList: ["green", "red", "yellow", "fault", "fireAlarm", "offline"], // 完整的图标
iconlist: [
// 多选框的图标
require("@/assets/images/map/ls_big.png"),
require("@/assets/images/map/yellow_big.png"), // 定位
require("@/assets/images/map/hs_big.png"),
require("@/assets/images/map/gz_big.png"),
require("@/assets/images/map/hj_big.png"),
require("@/assets/images/map/lx.png"),
require("@/assets/images/map/green_btn.png")
],
pointBox: {
lng: 0, lat: 0 },
show: true,
iconShow: false,
active: false,
pointList: [],
card: {
},
showicon: {
order: "",
clickNum: 0,
flag: true,
green: true,
red: true,
yellow: true,
fault: true,
fireAlarm: true,
offline: true
},
mapvLayer: {
},
rawData: {
} // 原始地图数据
};
},
watch: {
checkList(value) {
this.showicon = {
};
console.log(value);
this.fullList.map(item => {
if (value.indexOf(item) == -1) {
this.showicon[item] = false;
this.mapvLayer[item + "Layer"].hide();
} else {
this.showicon[item] = true;
this.mapvLayer[item + "Layer"].show();
}
});
}
},
created() {
// let userInfo = this.$store.state.userInfo;
// this.center = userInfo.dept.name;
// if (userInfo.dept.level != 0) {
// this.center = userInfo.dept.name;
// }
// if (userInfo.dept.level < 2) {
// this.location = "";
// } else if (userInfo.dept.level == 2) {
// this.location = userInfo.dept.region.name;
// } else {
// this.location = "";
// }
// this.zoom = 5 + userInfo.dept.level;
},
mounted() {
// getMapInfo().then(res => {
// this.mapdata = res.data;
// this.rawData = res.data;
// console.log(res.data, this.rawData, "这是后端的数据");
// });
},
methods: {
pointColor(mark) {
let result = {
};
switch (mark) {
case 1:
result = {
type: 0,
name: "green"
};
break;
case 2:
result = {
type: 1,
name: "yellow"
};
break;
case 3:
result = {
type: 2,
name: "red"
};
break;
case "故障":
result = {
type: 3,
name: "fault"
};
break;
case "火警":
result = {
type: 4,
name: "fireAlarm"
};
break;
case "离线":
result = {
type: 5,
name: "offline"
};
break;
}
return result;
},
handler({
BMap, map }) {
// map.setMapStyle({ styleJson: styleJson });
var mapv = require("mapv");
// setInterval(() => {
// console.log("定时任务启动");
// }, 20000);
// getMapInfo().then(res => {
let res = {
};
res.data = require("../../assets/json/mapInfo.json");
console.log("res.data", res.data);
this.mapdata = res.data;
let rawData = res.data;
// 改变地图主题颜色
// 黄色单位图标
let yellowIcon = document.createElement("img");
yellowIcon.src = require("@/assets/images/map/yellow_big.png");
// 绿色单位图标
let greenIcon = document.createElement("img");
greenIcon.src = require("@/assets/images/map/ls_big.png");
// 故障图标
let faultIcon = document.createElement("img");
faultIcon.src = require("@/assets/images/map/gz_big.png");
// 火警图标
let fireAlarmIcon = document.createElement("img");
fireAlarmIcon.src = require("@/assets/images/map/hj_big.png");
// 离线图标
let offlineIcon = document.createElement("img");
offlineIcon.src = require("@/assets/images/map/lx.png");
// 红色单位图标
let redIcon = document.createElement("img");
redIcon.src = require("@/assets/images/map/hs_big.png");
map.enableScrollWheelZoom(true); // 开启鼠标滚轮缩放
// 中心坐标
const that = this; // 改变this 指向
// 图片加载完成
redIcon.onload = function() {
var randomCount = 15;
// 储存各点数据
let redData = [];
let yellowData = [];
let greenData = [];
let faultData = [];
let fireAlarmData = [];
let offlineData = [];
let {
companyInfo, deviceInfo } = rawData;
let pointList = [];
if (companyInfo) {
companyInfo.map((value, index) => {
let company = that.pointColor(value.safeLevel);
switch (company.type) {
case 0:
greenData.push({
geometry: {
type: "Point",
coordinates: [value.lng, value.lat]
},
icon: greenIcon, // 图标
order: index, // 脚标
data: value, // 数据
tag: "green"
});
break;
case 1:
yellowData.push({
geometry: {
type: "Point",
coordinates: [value.lng, value.lat]
},
icon: yellowIcon, // 图标
order: index, // 脚标
data: value, // 数据
tag: "yellow"
});
break;
case 2:
redData.push({
geometry: {
type: "Point",
coordinates: [value.lng, value.lat]
},
icon: redIcon, // 图标
order: index, // 脚标
data: value, // 数据
tag: "red"
});
break;
}
});
}
if (deviceInfo) {
deviceInfo.map((value, index) => {
let device = that.pointColor(value.status);
switch (device.type) {
case 3:
faultData.push({
geometry: {
type: "Point",
coordinates: [value.lng, value.lat]
},
icon: faultIcon, // 图标
order: index, // 脚标
data: value, // 数据
tag: "fault"
});
break;
case 4:
fireAlarmData.push({
geometry: {
type: "Point",
coordinates: [value.lng, value.lat]
},
icon: fireAlarmIcon, // 图标
order: index, // 脚标
data: value, // 数据
tag: "fireAlarm"
});
break;
case 5:
offlineData.push({
geometry: {
type: "Point",
coordinates: [value.lng, value.lat]
},
icon: offlineIcon, // 图标
order: index, // 脚标
data: value, // 数据
tag: "offline"
});
break;
}
});
}
var redDataSet = new mapv.DataSet(redData);
var yellowDataSet = new mapv.DataSet(yellowData);
var greenDataSet = new mapv.DataSet(greenData);
var faultDataSet = new mapv.DataSet(faultData);
var fireAlarmDataSet = new mapv.DataSet(fireAlarmData);
var offlineDataSet = new mapv.DataSet(offlineData);
let nonce = 0;
var options = {
draw: "icon",
methods: {
// 默认鼠标进入图标显示信息栏 单击图标与信息栏以外区域隐藏信息栏
// 初始点击一次图标 锁定信息栏 再次点击图标 解锁信息栏
// 之后双击图标锁定信息栏 单击 解锁信息栏
mousemove: s => {
//图标点击事件
if (s && that.showicon[s.tag] && that.showicon.flag) {
nonce = 0;
that.pointDetail = s.data;
that.pointBox.lng = s.geometry.coordinates[0];
that.pointBox.lat = s.geometry.coordinates[1];
that.show = true;
if (that.show && that.$refs.customOverlay) {
that.$refs.customOverlay.reload();
}
}
},
click: m => {
that.showicon.clickNum++;
if (that.showicon.clickNum == 6) {
that.showicon.clickNum = 0;
}
if (that.showicon.clickNum == 3) {
if (!m) {
that.show = false;
that.showicon.flag = true;
} else {
that.showicon.flag = !that.showicon.flag;
}
}
if (m && that.showicon[m.tag] && that.showicon.flag) {
that.showicon.order = m.order;
that.pointDetail = m.data;
that.pointBox.lng = m.geometry.coordinates[0];
that.pointBox.lat = m.geometry.coordinates[1];
that.show = true;
if (that.show && that.$refs.customOverlay) {
that.$refs.customOverlay.reload();
}
}
}
},
showText: true,
avoid: true,
size: 12,
font: "16px Arial",
fillStyle: "red",
shadowColor: "red",
shadowBlur: 0,
textOffset: {
x: 0, y: -16 }
};
// eslint-disable-next-line new-cap
that.mapvLayer.redLayer = new mapv.baiduMapLayer(
map,
redDataSet,
options
);
that.mapvLayer.yellowLayer = new mapv.baiduMapLayer(
map,
yellowDataSet,
options
);
that.mapvLayer.greenLayer = new mapv.baiduMapLayer(
map,
greenDataSet,
options
);
that.mapvLayer.offlineLayer = new mapv.baiduMapLayer(
map,
offlineDataSet,
options
);
that.mapvLayer.faultLayer = new mapv.baiduMapLayer(
map,
faultDataSet,
options
);
that.mapvLayer.fireAlarmLayer = new mapv.baiduMapLayer(
map,
fireAlarmDataSet,
options
);
};
// });
},
draw({
el, BMap, map }) {
const {
lng, lat } = this.pointBox;
const pixel = map.pointToOverlayPixel(new BMap.Point(lng, lat));
el.style.left = pixel.x + 20 + "px";
el.style.top = pixel.y + 20 + "px";
},
// 点击坐标点
infoWindowOpen(e, index) {
this.currentIndex = index;
this.currentInfo = this.testlist[index];
console.log("e", e);
console.log("index", index);
let splitArr = e.target.z.title.split("-");
this.pointDetail = this.mapdata[splitArr[0]][splitArr[1]];
// this.choosePoint(e.point);
this.pointBox = e.point;
try {
e.stopPropagation(); //非IE浏览器
} catch (e) {
window.event.cancelBubble = true; //IE浏览器
}
this.show = true;
},
choosePoint(point) {
let lng = point.lng.toFixed(3);
let lat = point.lat.toFixed(3);
this.pointList.forEach(value => {
if (lng == value.longitude.toFixed(3)) {
if (lat == value.latitude.toFixed(3)) {
this.card = value;
this.show = true;
}
}
});
},
doSomething(e) {
try {
e.stopPropagation(); //非IE浏览器
} catch (e) {
window.event.cancelBubble = true; //IE浏览器
}
}
}
};
</script>
<style lang="less">
</style>
<style lang="less" scoped>
// BMap_cpyCtrl BMap_noprint anchorBL
#map-area {
width: 570px;
height: 520px;
margin-top: 20px;
position: relative;
overflow: hidden;
.bm-view {
width: 100%;
// height: 530px;
height: calc(100% - 45px);
position: relative;
&/deep/.anchorBL {
display: none;
}
&/deep/.BMap_noprint {
display: initial;
}
&/deep/.BMap_cpyCtrl {
display: none;
}
.map_content {
display: flex;
flex: 1;
position: absolute;
z-index: 999;
left: 50%;
width: auto;
min-height: 80px;
background: rgba(0, 0, 0, 0.7);
padding: 10px 0 10px 10px;
border-radius: 5px;
img {
width: 80px;
height: 60px;
}
.show_detail {
height: 20px;
position: absolute;
bottom: 0px;
right: 10px;
font-size: 12px;
// transform: scale(0.85);
// -webkit-transform-origin-x: left;
font-family: Microsoft YaHei;
}
.max {
font-size: 1.5rem;
color: #00e997;
font-weight: bold;
}
.more {
cursor: pointer;
color: #00ffff;
}
.map_content_box {
display: flex;
flex-direction: column;
box-sizing: border-box;
// padding-left: 20px;
color: #ffffff;
}
.map_text_title {
height: 16px;
padding: 0;
margin: 0;
display: flex;
align-items: center;
width: 100%;
span {
width: auto;
height: 100%;
line-height: 16px;
display: block;
white-space: nowrap;
}
}
.map_text_body {
margin-top: 10px;
padding-left: 5px;
display: flex;
ul {
margin: 0;
padding: 0;
li {
list-style: none;
height: 18px;
// width: 160px;
padding: 0;
margin: 0;
display: flex;
align-items: center;
justify-content: space-between;
overflow: hidden;
line-height: 100%;
span {
font-size: 14px;
font-weight: bold;
width: 100%;
height: 100%;
white-space: nowrap;
}
}
}
}
span {
font-size: 12px;
transform: scale(0.8);
-webkit-transform-origin-x: left;
font-family: Microsoft YaHei;
}
}
}
.mask {
width: 100%;
// height: 100%;
height: calc(100% - 60px);
position: absolute;
top: 40px;
left: 0;
pointer-events: none;
z-index: 10;
background: radial-gradient(
rgba(255, 255, 255, 0),
rgba(255, 255, 255, 0),
rgba(255, 255, 255, 0),
rgba(255, 255, 255, 0.1),
rgba(44, 90, 112, 0.2),
rgba(44, 90, 112, 0.5),
rgba(44, 90, 112, 0.8)
);
}
.map-info {
width: 100%;
height: 45px;
line-height: 10px;
font-size: 12px;
color: #ffffff;
text-align: left;
display: flex;
justify-content: flex-start;
flex-wrap: wrap;
.mini-icon {
width: auto;
height: 14px;
margin-bottom: -2px;
margin-right: 2px;
}
.info-label {
display: block;
width: auto;
}
.queryBox {
margin-left: 5px;
/deep/.el-input__inner {
width: 120px;
height: 20px;
}
/deep/.el-input__suffix {
display: flex;
justify-content: center;
align-items: center;
}
display: inline-block;
}
}
.map-top {
position: absolute;
top: 0px;
z-index: 99;
width: 100%;
display: flex;
justify-content: flex-end;
color: #ffffff;
font-size: 14px;
height: 35px;
pointer-events: none;
.info-label {
display: block;
height: 35px;
line-height: 35px;
padding-left: 15px;
}
.top-btn {
width: 88px;
background: url("../../assets/images/map/green_btn.png");
border: none;
color: #ffffff;
font-size: 14px;
cursor: pointer;
}
.top-btn:hover {
color: #e4e7ed;
}
}
.message {
width: 175px;
height: 60px;
position: absolute;
bottom: 30px;
right: 30px;
z-index: 15;
background: red;
}
.sample {
position: absolute;
}
}
.map-info &/deep/.el-checkbox {
margin-right: 0px;
margin-left: 10px;
}
.map-info &/deep/.el-checkbox__label {
padding-left: 3px;
color: #ffffff;
font-size: 12px;
}
.map-info &/deep/.el-checkbox__input.is-disabled {
display: none;
}
.map-info &/deep/.el-checkbox__input.is-disabled + span.el-checkbox__label {
padding-left: 15px;
}
</style>