如何在目标c中以英里为单位获得两个位置之间的距离？

Question

如何使用mapkit框架的distanceFromLocation方法计算两英里之间的距离.

谢谢

Answer 1

这已经在公制回答这里.现在你只需要将米转换为里程,即:

1 Meter = 0.000621371192 Miles 

要么

1 Mile = 1609.344 Meters 

Answer 2

试试以下代码:

double latA = [currentlat floatValue];
double logA = [currentlong floatValue];

double latB = [toLat floatValue];
double logB = [toLong floatValue];

CLLocation *locA = [[CLLocation alloc] initWithLatitude:latA
                                              longitude:logA];

CLLocation *locB = [[CLLocation alloc] initWithLatitude:latB longitude:logB];
CLLocationDistance distance = [locA distanceFromLocation:locB];
NSLog(@"Calculated Miles %@", [NSString stringWithFormat:@"%.1fmi",(distance/1609.344)]);