uniapp app下使用地图组件
uniapp 提供了地图组件<map>,app端使用map推荐使用nvue,官网https://uniapp.dcloud.io/component/map
<map>要显示的设置宽高,不要设置百分比
只支持 gcj02 坐标
示例,地图显示在上海区域,起点是虹桥火车站,当点击虹桥火车站这个地点marker,在地图上显示出目的地迪士尼,显示出路线图,并且控制在可视区域内
以下代码是在nvue中实现,只在app 中可用
坐标转换插件使用gcoord,https://github.com/hujiulong/gcoord
图标设置使用@2x,@3x的图标,在地图上会显示的清晰一点,其他的会很模糊
<template>
<view>
<map id="map" class="mapView"
:style="{'width':screenWidth+'px','height':screenHeight+'px'}"
scale="9"
:longitude="center[0]"
:latitude="center[1]"
:markers="markers"
:include-points="includePoints"
:polyline="polyline"
@markertap="showRoute"></map>
</view>
</template>
<script>
import gcoord from '../../common/gcoord.js'
export default {
data() {
return {
screenWidth: 0,
screenHeight: 0,
center: [121.506379, 31.245414], //地图中心点坐标,高德系经纬度
//百度坐标
points: {
longitude: 121.346817,
latitude: 31.203347,
tolng: 121.671964,
tolat: 31.148267
},
markers: [],
includePoints: [],
polyline:[],
line: {
width: 7,
// dottedLine: true,
arrowLine: true
},
}
},
onLoad() {
var that = this;
uni.getSystemInfo({
success: function(e) {
that.screenWidth = e.screenWidth;
that.screenHeight = e.screenHeight;
}
})
let center = this.transformBaiduToAm(this.center[0], this.center[1]);
this.center = center;//可以通过设置地图的longitude和latitude属性来移动地图到不同的城市
//首先将百度坐标转为高德系,引入gcoord插件
let start = this.transformBaiduToAm(this.points.longitude, this.points.latitude);
this.markers = [{
longitude: start[0],
latitude: start[1],
iconPath: '../../static/start@3x.png',
width: 30,
height: 30
}];
this.start = start;
},
onReady() {
//路线检索,会返回两个地点之间的经纬度,最后连线
this.mapContext = uni.createMapContext('map', this);
this.search = new plus.maps.Search(this.mapContext);
let that = this;
this.search.onRouteSearchComplete = function(state, result) {
if (state == 0) {
if (result.routeNumber <= 0) {
console.log("没有检索到结果");
}
for (var i = 0; i < result.routeNumber; i++) {
let points = result.getRoute(i).pointList;
that.line.points = points;
that.polyline = [that.line];//画路线
that.includePoints = points;
}
} else {
console.log("检索失败");
}
}
},
methods: {
//百度经纬度转成高德经纬度
transformBaiduToAm(lng, lat) {
return gcoord.transform(
[lng, lat], // 经纬度坐标
gcoord.BD09, // 当前坐标系
gcoord.GCJ02 // 目标坐标系
);
},
//点击marker时,在地图上上显示这个地点对应的另一个端点,并显示出路线
showRoute() {
//增加或者减少地图上的marker时,要重新赋值markers,
//如果两个marker有遮盖,后添加的层级更高
let point = this.transformBaiduToAm(this.points.tolng, this.points.tolat);
this.markers = [...this.markers, {
longitude: point[0],
latitude: point[1],
iconPath: '../../static/end@3x.png',
width: 30,
height: 30
}];
//在地图上画出两个地点的线路
//并且要把所有显示在地图上的marker都显示在可视区域内
//转为 point 对象
let start = new plus.maps.Point(this.start[0], this.start[1]);
let end = new plus.maps.Point(point[0], point[1]);
this.search.drivingSearch(start, '上海', end, '上海');
}
}
}
</script>
<style>
</style>

注:属性的更改比如markers,include-points 等设置在map 上的属性都是重新赋值进行更新,没有提供方法进行直接修改的
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