Note about MKAnnotation Protocol implementation

Sometimes you just have to take things as they are given, just like that. For example adding MKAnnotation protocol support all you have to do is create an instance variable called "coordinate":

@interface MyPointItem : NSObject <MKAnnotation> {
    NSString *title;
    NSInteger distance;
    CLLocationCoordinate2D coordinate;
}

As Apple documentation says:

"An object that adopts this protocol must implement the coordinate property."

There you are. As long as you remember, WHY you have a variable called "coordinate" INSTEAD OF "location". If you don't remember and apply Natural Naming to your code, your application will start crashing horribly for mysterious reasons...

How to Create Human-readable Geo Coordinate Strings

How to create human-readable coordinate strings, a code snippet that I wrote long time ago. Released here as a reminder for The Next Time (there's always a next time):

CLLocationCoordinate2D loc = mapView.userLocation.coordinate;

BOOL loc_NS;
if (loc.latitude > 0)
{
    loc_NS = YES;
}
else
{
    loc_NS = NO;
    loc.latitude *= -1;
}

int lat_d = floor(loc.latitude);
loc.latitude -= lat_d;
loc.latitude *= 60;
int lat_m = floor(loc.latitude);
loc.latitude -= lat_m;
loc.latitude *= 60;
int lat_s = floor(loc.latitude);

BOOL loc_WE;
if (loc.longitude > 0)
{
    loc_WE = NO;
}
else
{
    loc_WE = YES;
    loc.longitude *= -1;
}

int lon_d = floor(loc.longitude);
loc.longitude -= lon_d;
loc.longitude *= 60;
int lon_m = floor(loc.longitude);
loc.longitude -= lon_m;
loc.longitude *= 60;
int lon_s = floor(loc.longitude);

location.text = [NSString stringWithFormat:@"Location: %d°%d′%d″%@ %d°%d′%d″%@",
    lat_d, lat_m, lat_s, loc_NS ? @"N" : @"S",
    lon_d, lon_m, lon_s, loc_WE ? @"W" : @"E"];

Based on Wikipedia article about Geographic coordinate conversion.