Question

我想用Haversine公式计算两个地方之间的距离。实际上我有两个地方的纬度和经度值。现在我想用Haversine公式计算那些地方之间的距离。

例如：

 First Place: 
           "lat" :  12.97159870,
           "lng" : -77.59456270

Second Place:
           "lat" :  9.915996999999999,
           "lng" : -78.1218470
        },

现在我想用 Haversine Formula 来计算距离。

请帮帮我。谢谢！

Answer 1

您可以使用CLLocation类（CoreLocation.framework）方法的distanceFromLocation：（CLLocation *）loc;

CLLocation *locA = [[CLLocation alloc] initWithLatitude:lat1 longitude:long1];
CLLocation *locB = [[CLLocation alloc] initWithLatitude:lat2 longitude:long2];
CLLocationDistance distance = [locA distanceFromLocation:locB];
[locA release]; [locB release];

Answer 2

iOS提供了计算两个地理位置之间距离的标准方法 - 您需要使用CLLocation类：

#import <CoreLocation/CoreLocation.h>

CLLocation *loc1 = [[[CLLocation alloc] initWithLatitude:12.97159870 longitude:-77.59456270] autorelease];

CLLocation *loc2 = [[[CLLocation alloc] initWithLatitude: 9.915996 longitude:-78.1218470] autorelease];

double distance = [loc1 distanceFromLocation: loc2];

您还需要添加CoreLocation.framework以链接您的项目。

Answer 3

//将库复制到项目https://github.com/heycarsten/haversine-objc。然后使用

获得两个位置之间的距离

    Haversine *hvs = [[Haversine alloc]initWithLat1:Lati1 lon1:Longi1 lat2:Lati2 lon2:Longi2];

//使用数学公式获取距离..

    double dLat1InRad = DEGREES_TO_RADIANS(Lati1);
    double dLong1InRad = DEGREES_TO_RADIANS(Longi1);
    double dLat2InRad = DEGREES_TO_RADIANS(Lati2);
    double dLong2InRad = DEGREES_TO_RADIANS(Longi2);
    double dLongitude = dLong2InRad - dLong1InRad;
    double dLatitude = dLat2InRad - dLat1InRad;
    double a = pow(sin(dLatitude/2.0), 2)+ cos(dLat1InRad) * cos(dLat2InRad) * pow(sin(dLongitude / 2.0), 2);
    double c = 2.0 * asin(sqrt(a));
    const double kEarthRadiusKms = 6376.5;
    double dDistance = kEarthRadiusKms * c;

如何使用iPhone中的Haversine Formula计算两个地方之间的距离？

3 个答案: