如何计算两个位置距离？

Question

计算两个位置距离，如果距离大于5公里，则必须返回true？

Plz帮助我，我是MapView的新手。

Answer 1

试试这个

#import <CoreLocation/CoreLocation.h>

 CLLocation *locA = [[CLLocation alloc] initWithLatitude:lat1 longitude:long1];

 CLLocation *locB = [[CLLocation alloc] initWithLatitude:lat2 longitude:long2];

 CLLocationDistance distance = [locA distanceFromLocation:locB];

 //Distance in Meters

if((distance*1000)>5)
{
    //return true;
    // your coding
}

Answer 2

假设你有点的坐标。

CLLocation *locA = [[CLLocation alloc] initWithLatitude:lat1 longitude:long1];

 CLLocation *locB = [[CLLocation alloc] initWithLatitude:lat2 longitude:long2];

 CLLocationDistance distance = [locA distanceFromLocation:locB];

你还需要Dharmesh Dhorajiya提到的#import <CoreLocation/CoreLocation.h>