Question

所以我有一个包含10个条目的数组。每个条目都有一个“CustomeObj”类型的对象。在每个对象中，我存储了NSString和CLLocation var。（例如：“John”，“（23.33f，-32.44f））作为地图参考。

现在，我想在CLLocation变量中访问这些数字：

NSLog（@“％f”，obj.cllVar-＆gt;纬度）;返回0,0000，但调试器中的实际lat var具有实际值。是否有一个双重连接的wat：“obj.cllVar.lat”或是否有另一种拉动lat或long的方法。在cllVar中使用不同的运算符

非常感谢。

Answer 1

深入了解CLLocation获取包含lat＆amp; amp;的CLLocationCoordinate2D经度：

CLLocation *location = ...
CLLocationDegrees latitude  = location.coordinate.latitude;
CLLocationDegrees longitude = location.coordinate.longitude;

Answer 2

locations and maps programming guide可以为设备位置提供很多帮助。 Techtopia还提供了tutorial关于CLLocationManager的使用。这是一个引用CLLocation变量newLocation.coordinate.latitude，经度为newLocation.coordinate.longitude的代码段（有关详细信息，请参阅来源）：

#pragma mark -
#pragma mark CLLocationManagerDelegate

-(void)locationManager:(CLLocationManager *)manager
   didUpdateToLocation:(CLLocation *)newLocation
                  fromLocation:(CLLocation *)oldLocation
{
     NSString *currentLatitude = [[NSString alloc] 
                  initWithFormat:@"%g", 
                  newLocation.coordinate.latitude];
     latitude.text = currentLatitude;

     NSString *currentLongitude = [[NSString alloc] 
          initWithFormat:@"%g",
          newLocation.coordinate.longitude];
     longitude.text = currentLongitude;

     NSString *currentHorizontalAccuracy = 
              [[NSString alloc] 
             initWithFormat:@"%g",
             newLocation.horizontalAccuracy];
     horizontalAccuracy.text = currentHorizontalAccuracy;

     NSString *currentAltitude = [[NSString alloc] 
                  initWithFormat:@"%g",                                                          
                  newLocation.altitude];
     altitude.text = currentAltitude;

     NSString *currentVerticalAccuracy = 
              [[NSString alloc] 
              initWithFormat:@"%g",
              newLocation.verticalAccuracy];
     verticalAccuracy.text = currentVerticalAccuracy;

     if (startLocation == nil)
            self.startLocation = newLocation;

     CLLocationDistance distanceBetween = [newLocation
            distanceFromLocation:startLocation];

     NSString *tripString = [[NSString alloc] 
           initWithFormat:@"%f", 
           distanceBetween];
     distance.text = tripString;
}

如何从CLLocation变量中提取经度和纬度？

2 个答案: