//计算用户与商家之间的距离(封装
rad: function (d) {
return d * Math.PI / 180.0;
},
getDistance(lat1, lng1, lat2, lng2) {
var radLat1 = this.rad(lat1);
var radLat2 = this.rad(lat2);
var a = radLat1 - radLat2;
var b = this.rad(lng1) - this.rad(lng2);
var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)))
s = s * 6378.137; // EARTH_RADIUS;
s = Math.round(s * 1000) / 1000; //输出为公里
var distance = '';
if (s >= 1) {
distance = s.toFixed(1) + "km";
} else {
distance = s * 1000 + "m";
}
return distance;
},