@R:Code Shop
@SW:Geocoding for the iPhone

@D:Real-time geocoding services for iPhone
@T:Cartography

@V:We'll show you how to add location awareness to your iPhone apps.
@A:By George F. Frazier

@KT:Listing 1: The Short Leash App
@LI:
----------------- ShortLeashViewController.h --------

#import <UIKit/UIKit.h>
// CoreLocationDelegate contains code to handle location services (i.e. GPS)
#import "CoreLocationDelegate.h"

#import <MapKit/MKReverseGeocoder.h>

@interface ShortLeashViewController: UITableViewController<UIActionSheetDelegate,MKReverseGeocoderDelegate>
{
  CoreLocationDelegate *cLocation;
  MKReverseGeocoder *reverseGeo;
}
@end

----------------- ShortLeashViewController.m --------

#import "ShortLeashViewController.h"

@implementation ShortLeashViewController

#define CheckInNow 0
#define CallHomeNow 1

...

// 
//  Invoked by the table view when user taps on a row.
//  We have two rows, "Check In Now!" and "Call Home Now!"
//
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
  CLLocationCoordinate2D *here;
  if (CheckInNow == [indexPath row])
  {
            // getCurrentLocation returns the last location
            // fix that you stashed while listening for location changes
    here = [cLocation getCurrentLocation];
    if (!here){
      // we don't have a valid location, ask your object
      // to find a new one and make sure to let the user 
      // know this might take a while
                  [cLocation stirUpANewLocation];
      return;
    }
    

    reverseGeo = [[MKReverseGeocoder alloc] initWithCoordinate:here];
  
    if (reverseGeo)
    {
          reverseGeo.delegate = self;
      [reverseGeo start];
    }
    
  }
      // Call Home
  else {
          [self CallHomeNow];
  }
  // Fade the selection
  [self performSelector:@selector(deselect:) withObject:nil afterDelay:0.5f];
}


- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error
{
  [reverseGeo release];
}

- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark
{
  [reverseGeo release];
  NSString *msg = [NSString stringWithFormat:@"I\'m at %@ in %@, %@. ET has phoned home, happy now?",
        placemark.thoroughfare, placemark.administrativeArea, placemark.postalCode];
           [self sendSMS:msg];
           [msg release];
}

- (void) CallHomeNow
{
...
}

- (void) sendSMS:(NSString *)msg
{
...
}

...

@end
@KE: