<template>
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<div class="map-wrapper">
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<div ref="mapContainer" class="map-container"></div>
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</div>
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</template>
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<script>
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let baiduMapPromise = null;
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function loadBaiduMapScript() {
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const ak = 'H4IN9QhFD5mC72tJEvbZysO7SKf0vDMa';
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if (window.BMapGL) {
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return Promise.resolve();
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}
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if (baiduMapPromise) {
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return baiduMapPromise;
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}
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baiduMapPromise = new Promise((resolve, reject) => {
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window.__baidu_map_callback = function() {
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delete window.__baidu_map_callback; // 清理全局回调
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resolve();
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};
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const script = document.createElement('script');
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script.type = 'text/javascript';
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script.src = `//api.map.baidu.com/api?type=webgl&v=1.0&ak=${ak}&callback=__baidu_map_callback`;
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script.onerror = (error) => {
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delete window.__baidu_map_callback;
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baiduMapPromise = null; // 允许重试
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reject(error);
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};
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document.body.appendChild(script);
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});
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return baiduMapPromise;
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}
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export default {
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name: 'BaiduMap',
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props: {
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center: {
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type: Object,
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default: () => ({ lng: 0, lat: 0 })
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},
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limitDistanceFlag: Boolean
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},
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data() {
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return {
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map: null,
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zoom: 17,
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userPosition: null
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};
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},
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mounted() {
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this.loadMap();
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},
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beforeUnmount() {
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if (this.map) {
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this.map.destroy();
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this.map = null;
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}
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},
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watch: {
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center: {
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handler: function(val) {
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const newPoint = new BMapGL.Point(val.lng, val.lat);
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this.map.setCenter(newPoint)
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},
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deep: true
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}
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},
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methods: {
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loadMap() {
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loadBaiduMapScript()
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.then(() => {
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this.initMap();
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})
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.catch(err => {
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this.$emit('getMapStatus', 'fail')
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console.error('地图脚本加载失败:', err);
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});
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},
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initMap() {
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const container = this.$refs.mapContainer;
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if (!container) return;
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const map = new BMapGL.Map(container);
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const point = new BMapGL.Point(this.center.lng, this.center.lat);
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map.centerAndZoom(point, this.zoom);
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map.enableScrollWheelZoom();
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this.map = map;
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this.$emit('ready', map);
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this.$emit('getMapStatus', 'success')
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this.getUserPosition()
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},
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async getUserPosition() {
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const geolocation = new BMapGL.Geolocation();
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let that = this
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geolocation.getCurrentPosition(function(r){
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if(this.getStatus() == BMAP_STATUS_SUCCESS){
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// 定位成功，r.point 即为获取到的百度坐标（BD09ll）
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let pt = r.point;
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that.userPosition = {
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lng: pt.lng,
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lat: pt.lat
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}
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const positionAddressText = r.address.province + r.address.city + r.address.district + r.address.street
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that.$emit('getUserPositionStatus', {
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status: 'success',
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userPositionText: positionAddressText
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})
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if (this.limitDistanceFlag) {
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that.diffDistance()
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} else {
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const newPoint = new BMapGL.Point(that.userPosition.lng, that.userPosition.lat);
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that.map.setCenter(newPoint)
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}
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} else {
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that.$emit('getUserPositionStatus', { status: 'fail' })
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}
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});
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},
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diffDistance() { //测距
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if (!this.map || !this.userPosition) return
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const userPoint = new BMapGL.Point(this.userPosition.lng, this.userPosition.lat); // 点A坐标
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const centerPoint = new BMapGL.Point(this.center.lng, this.center.lat); // 点B坐标
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const distance = this.map.getDistance(userPoint,centerPoint)
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this.$emit('getDistance', Math.floor(distance))
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}
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}
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};
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</script>
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<style scoped>
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.map-wrapper {
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width: 100%;
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height: 100%;
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margin: 0;
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padding: 0;
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}
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.map-container {
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width: 100%;
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height: 100%;
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margin: 0;
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padding: 0;
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}
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</style>
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