118 lines
2.9 KiB
TypeScript
118 lines
2.9 KiB
TypeScript
import Taro from '@tarojs/taro'
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export interface Location {
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latitude: number
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longitude: number
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speed?: number
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accuracy?: number
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}
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export interface LocationInfo {
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latitude: number
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longitude: number
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address: string
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name?: string
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}
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// 获取当前位置
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export const getCurrentLocation = (): Promise<LocationInfo> => {
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return new Promise((resolve, reject) => {
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Taro.getLocation({
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type: 'wgs84',
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success: (res) => {
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console.log('===获取地理位置', res)
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// 使用逆地理编码获取地址信息
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reverseGeocode(res.latitude, res.longitude)
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.then(address => {
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resolve({
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latitude: res.latitude,
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longitude: res.longitude,
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address
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})
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})
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.catch(() => {
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resolve({
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latitude: res.latitude,
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longitude: res.longitude,
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address: `${res.latitude.toFixed(6)}, ${res.longitude.toFixed(6)}`
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})
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})
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},
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fail: (error) => {
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reject(error)
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}
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})
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})
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}
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// 选择地图位置
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export const chooseLocation = (): Promise<LocationInfo> => {
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return new Promise((resolve, reject) => {
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Taro.chooseLocation({
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success: (res) => {
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resolve({
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latitude: res.latitude,
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longitude: res.longitude,
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address: res.address,
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name: res.name
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})
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},
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fail: (error) => {
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reject(error)
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}
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})
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})
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}
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export const getLocation = (): Promise<Location> => {
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return new Promise((resolve, reject) => {
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Taro.getLocation({
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success: (res) => {
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resolve({
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latitude: res.latitude,
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longitude: res.longitude,
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speed: res.speed,
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accuracy: res.accuracy
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})
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},
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fail: (error) => {
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reject(error)
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}
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})
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})
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}
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// 逆地理编码（简化版本，实际项目中应该调用真实的地图服务API）
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export const reverseGeocode = (latitude: number, longitude: number): Promise<string> => {
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return new Promise((resolve) => {
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// 这里应该调用真实的地图服务API，比如腾讯地图、高德地图等
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// 暂时返回坐标字符串
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setTimeout(() => {
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resolve(`纬度:${latitude.toFixed(6)}, 经度:${longitude.toFixed(6)}`)
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}, 500)
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})
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}
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// 计算两点间距离（单位：米）
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export const calculateDistance = (
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lat1: number,
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lng1: number,
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lat2: number,
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lng2: number
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): number => {
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const radLat1 = lat1 * Math.PI / 180.0
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const radLat2 = lat2 * Math.PI / 180.0
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const a = radLat1 - radLat2
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const b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0
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let s = 2 * Math.asin(Math.sqrt(
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Math.pow(Math.sin(a/2), 2) +
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Math.cos(radLat1) * Math.cos(radLat2) *
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Math.pow(Math.sin(b/2), 2)
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))
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s = s * 6378.137 // 地球半径
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s = Math.round(s * 10000) / 10000
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return s * 1000 // 转换为米
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}
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