使用CLLocation计算距离iOS MapKit

概述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(!newLocat 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];

总结

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