WhereCamp EU talk: iPhone location 101

iPhone geo hacking 101 Michael Dales

• 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?

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?

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?

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

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

- (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]; }

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

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

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

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]; }

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

maps demo

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];

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

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

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 }

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

WhereCamp EU talk: iPhone location 101

by Michael Dales

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