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184 lines
4.3 KiB
184 lines
4.3 KiB
import config from '../config.js'
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/**
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* 计算两点之间的距离
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* @param {number} lat1 地点1精度
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* @param {number} lon1 地点1维度
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* @param {number} lat2 地点2精度
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* @param {number} lon2 地点2维度
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* @param {number} fixed 保留几位小数,默认0,单位km
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*/
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function calculateDistance(lat1, lon1, lat2, lon2, fixed = 0) { //计算两点距离
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let distance = 0
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if (!lat2 || !lon2) return distance
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//先强制转换一下(后端给的字符串)
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lat1 = parseFloat(lat1)
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lon1 = parseFloat(lon1)
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lat2 = parseFloat(lat2)
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lon2 = parseFloat(lon2)
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// 将角度转换为弧度
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const R = 6371; // 地球半径，单位公里
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const dLat = (lat2 - lat1) * Math.PI / 180;
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const dLon = (lon2 - lon1) * Math.PI / 180;
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lat1 = lat1 * Math.PI / 180;
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lat2 = lat2 * Math.PI / 180;
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// Haversine公式
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const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
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Math.sin(dLon / 2) * Math.sin(dLon / 2) * Math.cos(lat1) * Math.cos(lat2);
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const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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// 计算距离
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distance = R * c;
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return distance.toFixed(fixed)
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}
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function getLocation(fn) { //获取用户经纬度
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wxGetLocation() //此方法只用于提示用户打开gps
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uni.getLocation({
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type: 'gcj02',
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isHighAccuracy: true,
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highAccuracyExpireTime: 1000,
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success: function(position) {
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fn(position)
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},
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fail: function() { //使用ip获取定位
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let key = config.mapKey; //腾讯地图key
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getUserAddressByIp(key).then(res => {
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fn(res.position) //返回经纬度
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})
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}
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})
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}
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function getLocationDetail() { //获取用户详细地址
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wxGetLocation()
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return new Promise((resolve, reject) => {
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let key = config.mapKey; //腾讯地图key
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uni.getLocation({
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type: 'gcj02',
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isHighAccuracy: true,
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highAccuracyExpireTime: 1000,
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success: function(position) {
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getUserAddress(position.latitude, position.longitude, key).then(res => {
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resolve(res)
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})
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},
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fail: function() { //使用ip获取定位
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getUserAddressByIp(key).then(res => {
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resolve(res)
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})
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}
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})
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})
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}
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function getUserAddress(latitude, longitude, key) { //通过经纬度获取用户详细地址
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return new Promise((resolve, reject) => {
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let url = `/ws/geocoder/v1/?location=${latitude},${longitude}&key=${key}`
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// #ifndef H5
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url = `https://apis.map.qq.com` + url
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// #endif
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uni.request({
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url,
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success: (res) => {
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let {
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lat,
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lng
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} = res.data.result.ad_info.location;
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let data = {
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position: {
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latitude: lat,
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longitude: lng
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},
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addressDetail: res.data.result.ad_info
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}
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resolve(data)
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},
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fail(err) {
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reject(err)
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}
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})
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})
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}
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function getUserAddressByIp(key) { //根据IP获取当前用户位置
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return new Promise((resolve, reject) => {
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uni.request({
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url: 'https://api.ipify.org?format=json',
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success: (ipInfo) => {
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let url = `/ws/location/v1/ip?ip=${ipInfo.data.ip}&key=${key}`
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// #ifndef H5
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url = `https://apis.map.qq.com` + url
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// #endif
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uni.request({
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url,
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success: (res) => {
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let {
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lat,
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lng
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} = res.data.result.location;
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let data = {
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addressDetail: res.data.result.ad_info,
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ip: res.data.result.ip,
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position: {
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latitude: lat,
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longitude: lng
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}
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}
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resolve(data)
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},
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fail(err) {
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reject(err)
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}
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})
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}
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})
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})
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}
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//打开地图让用户选择位置
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function selectAddress(longitude, latitude, successCallback) {
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uni.chooseLocation({
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longitude, //经度
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latitude, //纬度
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success: function(res) {
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successCallback && successCallback(res)
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}
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});
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}
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//sdk自带获取位置方法(只支持微信环境),这里只当提示在用了(具体获取地址逻辑上面几个方法已完成)
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function wxGetLocation(successCallback, failCallback) {
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// #ifdef MP-WEIXIN
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// #endif
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console.log('wx.getLocation');
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wx.getLocation({
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type: 'gcj02',
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isHighAccuracy: true,
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highAccuracyExpireTime: 2000,
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success(res) {},
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fail(err) {
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if(err.errMsg == 'getLocation:gps closed'){
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uni.showToast({
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title: '请打开GPS定位,否则定位不准确',
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icon: 'none'
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})
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}
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}
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})
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}
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export default {
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calculateDistance, //计算两点距离
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getLocationDetail, //获取用户详细地址
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getLocation, //获取用户经纬度
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selectAddress, //打开地图让用户选择位置
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wxGetLocation,
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}
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