使用CLLocation计算距离iOS MapKit

我正在尝试使用经度和纬度查找以英里为单位的距离。 我有以下的方法：

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { if(!newLocation) return; if ((oldLocation.coordinate.latitude != newLocation.coordinate.latitude) && (oldLocation.coordinate.longitude != newLocation.coordinate.longitude)) { CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:oldLocation.coordinate.latitude longitude:oldLocation.coordinate.longitude]; CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.latitude]; CLLocationDistance distance = ([loc2 distanceFromLocation:loc1]) * 0.000621371192; //distance = distance; NSLog(@"Total Distance %f in miles",distance); } } 

出于某种原因，它打印出5678.32英里的东西。 位置非常静止，根本不移动。

Answer 1

 CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.(!!!!!)latitude longitude:newLocation.coordinate.(!!!!!)latitude]; 

Answer 2

您正在使用经纬度新位置的纬度初始化loc2：

这一行：

 CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.latitude]; 

应该说：

 CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.longitude]; 

希望能帮助到你！