110 lines
2.7 KiB
JavaScript
110 lines
2.7 KiB
JavaScript
/**
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* 高德地图微信小程序SDK - 纯定位版
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* 只负责GPS定位，地址解析由后端处理
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*/
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class AMapWX {
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constructor(options = {}) {
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this.key = options.key || '';
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this.version = '1.5.0';
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if (this.key) {
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console.log(`API Key: ${this.key.substring(0, 8)}...`);
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}
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}
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/**
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* 获取微信定位 - 主要功能
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* @param {function} callback - 定位回调函数 callback(location, error)
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* @param {object} options - 定位选项
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*/
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getWxLocation(callback, options = {}) {
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const defaultOptions = {
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type: 'gcj02',
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isHighAccuracy: true,
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highAccuracyExpireTime: 4000,
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...options
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};
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wx.getLocation({
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...defaultOptions,
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success: (res) => {
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const location = {
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longitude: res.longitude,
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latitude: res.latitude,
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accuracy: res.accuracy || 0,
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altitude: res.altitude || 0,
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speed: res.speed || 0,
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horizontalAccuracy: res.horizontalAccuracy || 0,
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verticalAccuracy: res.verticalAccuracy || 0
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};
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if (typeof callback === 'function') {
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callback(location, null);
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}
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},
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fail: (err) => {
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console.error('[AMapWX] 微信定位失败:', err);
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if (typeof callback === 'function') {
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callback(null, 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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* 计算两点间距离
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* @param {object} point1 - 起点 {longitude, latitude}
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* @param {object} point2 - 终点 {longitude, latitude}
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* @returns {number} 距离（米）
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*/
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calculateDistance(point1, point2) {
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const R = 6371000; // 地球半径（米）
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const lat1 = point1.latitude * Math.PI / 180;
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const lat2 = point2.latitude * Math.PI / 180;
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const deltaLat = (point2.latitude - point1.latitude) * Math.PI / 180;
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const deltaLng = (point2.longitude - point1.longitude) * Math.PI / 180;
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const a = Math.sin(deltaLat / 2) * Math.sin(deltaLat / 2) +
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Math.cos(lat1) * Math.cos(lat2) *
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Math.sin(deltaLng / 2) * Math.sin(deltaLng / 2);
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const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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return R * c;
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}
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}
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// 创建单例实例
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let amapInstance = null;
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const AmapWX = {
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/**
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* 获取SDK实例
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* @param {object} options - 配置选项
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* @returns {AMapWX}
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*/
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getInstance(options = {}) {
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if (!amapInstance) {
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amapInstance = new AMapWX(options);
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}
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return amapInstance;
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},
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/**
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* 重置SDK实例
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* @param {object} options - 配置选项
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* @returns {AMapWX}
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*/
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resetInstance(options = {}) {
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amapInstance = new AMapWX(options);
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return amapInstance;
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}
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};
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// 导出模块
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module.exports = {
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AMapWX,
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AmapWX
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};
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