今天要实现的是行政区边界绘制
我们先说一下需求
当用户在页面上输入一个地点之后点击搜索,我们的地图会显示行政区(国,区,市等)的边界,这听起来很简单,确实如果在一个页面上同时编好地图,搜索框确实很简单但是如果我们使用vue则不然
在vue上我们把search组件和地图组件分成了两个单独的组件然后又放在一个vue页面中,这就需要我们进行组件之间的数据传输,数据监测这些手段!
使用高德地图的AMap.DistrictSearch进行搜索后获取区域边界的坐标值,然后将坐标值提取成数组,最后进行绘制
globals: {
AMap: true
}
import Vue from 'vue'
//兄弟组件之间进行通行
export default new Vue()
<script>
import bus from '@/eventBus/eventBus.js'
export default {
data() {
return {
search_id: 'searchId',
input: ''
}
},
methods: {
//传输入框
sendMsg() {
bus.$emit('share', this.input)
},
//传id
sendId() {
bus.$emit('share_id', this.search_id)
}
},
mounted() {
this.sendId()
}
}
</script>
当watch监测到输入框的值改变发送过来就会调用drawBounds(newValue)函数
data() {
return {
map: null,
//接收Search组件传输input的id
autoOptions: {
input: ''
},
auto: null,
placeSearch: null,
//接收Search组件传输input输入框的值
searchPlaceInput: '',
district: null,
polygons: []
}
},
created() {
//Search组件传输input的id
bus.$on('share_id', val => {
this.autoOptions.input = val
}),
//Search组件传输input输入框的值
bus.$on('share', val => {
this.searchPlaceInput = val
})
},
watch: {
// 点击搜索按钮后传值的poi搜索
searchPlaceInput(newValue) {
if (newValue != null) {
this.placeSearch.search(newValue)
this.map.setZoom(16, true, 1)
this.drawBounds(newValue)
}
}
}
methods:{
// 行政区区域划分
drawBounds(newValue) {
//加载行政区划插件
if (!this.district) {
//实例化DistrictSearch
var opts = {
subdistrict: 0, //获取边界不需要返回下级行政区
extensions: 'all', //返回行政区边界坐标组等具体信息
level: 'district' //查询行政级别为 市
}
this.map.plugin(['AMap.DistrictSearch'], () => {
this.district = new AMap.DistrictSearch(opts)
})
// this.district = new AMap.DistrictSearch(opts)
}
//行政区查询
this.district.search(newValue, (status, result) => {
if (this.polygons != null) {
this.map.remove(this.polygons) //清除上次结果
this.polygons = []
}
var bounds = result.districtList[0].boundaries
if (bounds) {
for (var i = 0, l = bounds.length; i < l; i++) {
//生成行政区划polygon
var polygon = new AMap.Polygon({
strokeWeight: 1,
path: bounds[i],
fillOpacity: 0.4,
fillColor: '#80d8ff',
strokeColor: '#0091ea'
})
this.polygons.push(polygon)
}
}
this.map.add(this.polygons)
this.map.setFitView(this.polygons) //视口自适应
})
}
}
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<title>行政区边界查询</title>
<link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css"/>
<style>
html,body,#container{
margin:0;
height:100%;
}
.input-item-text{
width:7rem;
}
</style>
</head>
<body>
<div id="container"></div>
<div class="input-card">
<label style='color:grey'>行政区边界查询</label>
<div class="input-item">
<div class="input-item-prepend">
<span class="input-item-text" >行政级别</span>
</div>
<select id="level">
<option value="district">district</option>
<option value="city">city</option>
<option value="province">province</option>
</select>
</div>
<div class="input-item">
<div class="input-item-prepend">
<span class="input-item-text" >名称/adcode</span>
</div>
<input id='district' type="text" value='朝阳区'>
</div>
<input id="draw" type="button" class="btn" value="查询" />
</div>
<script type="text/javascript" src="//webapi.amap.com/maps?v=2.0&key=您申请的key值&plugin=AMap.DistrictSearch"></script>
<script type="text/javascript">
//初始化地图对象,加载地图
var map = new AMap.Map("container", {
center: [116.397428, 39.90923],//地图中心点
zoom: 10 //地图显示的缩放级别
});
var district = null;
var polygons=[];
function drawBounds() {
//加载行政区划插件
if(!district){
//实例化DistrictSearch
var opts = {
subdistrict: 0, //获取边界不需要返回下级行政区
extensions: 'all', //返回行政区边界坐标组等具体信息
level: 'district' //查询行政级别为 市
};
district = new AMap.DistrictSearch(opts);
}
//行政区查询
district.setLevel(document.getElementById('level').value)
district.search(document.getElementById('district').value, function(status, result) {
map.remove(polygons)//清除上次结果
polygons = [];
var bounds = result.districtList[0].boundaries;
if (bounds) {
for (var i = 0, l = bounds.length; i < l; i++) {
//生成行政区划polygon
var polygon = new AMap.Polygon({
strokeWeight: 1,
path: bounds[i],
fillOpacity: 0.4,
fillColor: '#80d8ff',
strokeColor: '#0091ea'
});
polygons.push(polygon);
}
}
map.add(polygons)
map.setFitView(polygons);//视口自适应
});
}
drawBounds();
document.getElementById('draw').onclick = drawBounds;
document.getElementById('district').onkeydown = function(e) {
if (e.keyCode === 13) {
drawBounds();
return false;
}
return true;
};
</script>
</body>
</html>
这是因为官方使用的函数是
function(){}
这也是报错的原因,我们要把这个回调函数改成es6语法下的箭头函数就不会报错了
()=>{}
<script>
import bus from '@/eventBus/eventBus.js'
import AMapLoader from '@amap/amap-jsapi-loader'
export default {
data() {
return {
map: null,
//接收Search组件传输input的idy
autoOptions: {
input: ''
},
auto: null,
placeSearch: null,
//接收Search组件传输input输入框的值
searchPlaceInput: '',
district: null,
polygons: []
}
},
created() {
//Search组件传输input的id
bus.$on('share_id', val => {
this.autoOptions.input = val
}),
//Search组件传输input输入框的值
bus.$on('share', val => {
this.searchPlaceInput = val
})
},
methods: {
initMap() {
AMapLoader.load({
key: '2c1c4affeb410923990fec54c5af721a', // 申请好的Web端开发者Key,首次调用 load 时必填
version: '2.0', // 指定要加载的 JSAPI 的版本,缺省时默认为 1.4.15
plugins: ['AMap.DistrictSearch', 'AMap.ToolBar', 'AMap.Scale', 'AMap.HawkEye', 'AMap.MapType', 'AMap.Geolocation', 'AMap.PlaceSearch', 'AMap.AutoComplete'] // 需要使用的的插件列表,如比例尺'AMap.Scale'等
})
.then(AMap => {
this.map = new AMap.Map('container', {
resizeEnable: true,
//设置地图容器id
viewMode: '3D', //是否为3D地图模式
zoom: 14, //初始化地图级别
center: [121.473667, 31.230525] //初始化地图中心点位置
})
this.map.addControl(new AMap.Scale())
this.map.addControl(new AMap.ToolBar())
this.map.addControl(new AMap.HawkEye())
this.map.addControl(new AMap.MapType())
this.map.addControl(new AMap.Geolocation())
this.auto = new AMap.AutoComplete(this.autoOptions)
// 绑定搜索地图
this.placeSearch = new AMap.PlaceSearch({
map: this.map
}) //构造地点查询类
this.auto.on('select', this.select)
})
.catch(e => {
console.log(e)
})
},
//poi搜索
select(e) {
this.placeSearch.setCity(e.poi.adcode)
this.placeSearch.search(e.poi.name) //关键字查询查询
this.map.setCenter([e.poi.location.lng, e.poi.location.lat])
this.map.setZoom(16, true, 1)
this.drawBounds(e.poi.name)
},
// 行政区区域划分
drawBounds(newValue) {
//加载行政区划插件
if (!this.district) {
//实例化DistrictSearch
var opts = {
subdistrict: 0, //获取边界不需要返回下级行政区
extensions: 'all', //返回行政区边界坐标组等具体信息
level: 'district' //查询行政级别为 市
}
this.map.plugin(['AMap.DistrictSearch'], () => {
this.district = new AMap.DistrictSearch(opts)
})
// this.district = new AMap.DistrictSearch(opts)
}
//行政区查询
this.district.search(newValue, (status, result) => {
if (this.polygons != null) {
this.map.remove(this.polygons) //清除上次结果
this.polygons = []
}
var bounds = result.districtList[0].boundaries
if (bounds) {
for (var i = 0, l = bounds.length; i < l; i++) {
//生成行政区划polygon
var polygon = new AMap.Polygon({
strokeWeight: 1,
path: bounds[i],
fillOpacity: 0.4,
fillColor: '#80d8ff',
strokeColor: '#0091ea'
})
this.polygons.push(polygon)
}
}
this.map.add(this.polygons)
this.map.setFitView(this.polygons) //视口自适应
})
}
},
mounted() {
//DOM初始化完成进行地图初始化
this.initMap()
// this.drawBounds()
},
watch: {
// 点击搜索按钮后传值的poi搜索
searchPlaceInput(newValue) {
if (newValue != null) {
this.placeSearch.search(newValue)
this.map.setZoom(16, true, 1)
this.drawBounds(newValue)
}
}
}
}
</script>