1. iPhone geo hacking 101
Michael Dales

2. • where am I?
• no, really, I’m a human. where am I?
• Can you show me where I am?
• Can you show me where it is?
• where should I be?

3. CoreLocation
• where am I?
• no, really, I’m a human. where am I?
• Can you show me where I am?
• Can you show me where it is?
• where should I be?

4. CoreLocation
• where am I?
• no, really, I’m a human. where am I?
• Can you show me where I am?
• Can you show me where it is? MapKit
• where should I be?

5. CoreLocation
• where am I?
• no, really, I’m a human. where am I?
• Can you show me where I am?
• Can you show me where it is? MapKit
• where should I be? AddressBook

6. locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy =
kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];

7. - (void)locationManager: (CLLocationManager *)manager
didUpdateToLocation: (CLLocation *)newLocation
fromLocation: (CLLocation *)oldLocation
{
NSString *latitudeString = [[NSString alloc] initWithFormat: @"%g",
newLocation.coordinate.latitude];
latitudeLabel.text = latitudeString;
[latitudeString release];
NSString *longitudeString = [[NSString alloc] initWithFormat: @"%g",
newLocation.coordinate.longitude];
longitudeLabel.text = longitudeString;
[longitudeString release];
}

8. CLLocation
• Location info
• lat, long, accuracy
• Altitude info, speed info,
heading info
• ask distance from
another point

9. • Remember the user!
• Battery matters to them
• Also available on the Mac

11. MKReverseGeocoder *geocoder = [[MKReverseGeocoder alloc] initWithCoordinate:
coordinate];
geocoder.delegate = self;
[geocoder start];

12. MKReverseGeocoder *geocoder = [[MKReverseGeocoder alloc] initWithCoordinate:
coordinate];
geocoder.delegate = self;
[geocoder start];
and a little later...
- (void)reverseGeocoder: (MKReverseGeocoder *)geocoder
didFindPlacemark: (MKPlacemark *)pplacemark
{
self.placemark = pplacemark;
geocoder.delegate = nil;
[geocoder autorelease];
}

13. MKPlacemark
NSString *thoroughfare; // street address, eg 1 Infinite Loop
NSString *subThoroughfare;
NSString *locality; // city, eg. Cupertino
NSString *subLocality; // neighborhood, landmark, common name, etc
NSString *administrativeArea; // state, eg. CA
NSString *subAdministrativeArea; // county, eg. Santa Clara
NSString *postalCode; // zip code, eg 95014
NSString *country; // eg. United States
NSString *countryCode; // eg. US

15. maps demo

17. set where to look
MKCoordinateRegion region;
region.center = lastPoint.coordinate;
region.span.latitudeDelta = 0.002;
region.span.longitudeDelta = 0.002;
[mapView setRegion: region
animated: YES];

18. annotations
@interface LocationDemoAnnotation : NSObject <MKAnnotation,
MKReverseGeocoderDelegate>
{
// essential
CLLocationCoordinate2D coordinate;
}
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
- (id)initWithCoordinate: (CLLocationCoordinate2D)coord;
- (NSString *)title;
- (NSString *)subtitle;

20. making it personal
ABAddressBook *addressBook = [ABAddressBook addressBook];
ABPerson *me = [addressBook me];
id home = [me valueForProperty: kABAddressProperty];

21. making it personal
ABAddressBook *addressBook = [ABAddressBook addressBook];
ABPerson *me = [addressBook me];
id home = [me valueForProperty: kABAddressProperty];
2010-03-12 13:34:09.804 MacLocationTest[34432:a0b] ABPerson (0x20009d180) {
ABPersonFlags : 0
Address :{
home {
City = Impington;
Country = UK;
State = Cambridge;
Street = "42 North Road";
ZIP = "CB99 9ZX";
}
}
Creation : 2010-01-04 18:00:01 +0000
First : Michael
Last : Dales
Modification : 2010-03-12 13:29:27 +0000
Unique ID : 506661FE-8D0D-407F-AEAB-61699D59E943:ABPerson
}

22. what’s left
• Talking to something else
• ASIHTTPRequest
• JSON Framework