我试图用纬度和经度找到以英里为单位的距离.我有以下方法:
- (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); } }
由于某种原因,它打印出类似5678.32英里的东西.这个位置非常固定,根本不动.
解决方法
CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.(!!!!!)latitude longitude:newLocation.coordinate.(!!!!!)latitude];