iOS 地图 通过经纬度计算两点间距离

- (double)calculateStart:(CLLocationCoordinate2D)start end:(CLLocationCoordinate2D)end {

    

    double meter = 0;

    

    double startLongitude = start.longitude;

    double startLatitude = start.latitude;

    double endLongitude = end.longitude;

    double endLatitude = end.latitude;

    

    double radLatitude1 = startLatitude * M_PI / 180.0;

    double radLatitude2 = endLatitude * M_PI / 180.0;

    double a = fabs(radLatitude1 - radLatitude2);

    double b = fabs(startLongitude * M_PI / 180.0 - endLongitude * M_PI / 180.0);

    

    double s = 2 * asin(sqrt(pow(sin(a/2),2) + cos(radLatitude1) * cos(radLatitude2) * pow(sin(b/2),2)));

    s = s * EARTH_RADIUS;

    

    meter = round(s * 10000) / 10000; //返回距离单位是米

    return meter;

}

//赤道半径
EARTH_RADIUS = 6378137;

//start 起点经纬度,数据格式 start = {lon:,lat:}
//end 终点定位度,数据格式 end = {lon:,lat:}