The document provides an introduction to using MapKit in iPhone applications, explaining the process of adding maps, managing annotations, and utilizing geocoding functionalities. It outlines steps for setting map positions, displaying user locations, and creating custom annotation views. Additionally, it references resources for further learning about MapKit integration and usage.

1. An Intro to MapKit
Rob Caporetto
@rob_caporetto

2. The Plan

3. The Plan
What is MapKit?

4. The Plan
What is MapKit?
Adding MapKit to your iPhone Application

5. The Plan
What is MapKit?
Adding MapKit to your iPhone Application
Setting the Position

6. The Plan
What is MapKit?
Adding MapKit to your iPhone Application
Setting the Position
Annotations

7. The Plan
What is MapKit?
Adding MapKit to your iPhone Application
Setting the Position
Annotations
Geocoding

8. The Plan
What is MapKit?
Adding MapKit to your iPhone Application
Setting the Position
Annotations
Geocoding
Interacting with Core Location

9. What is MapKit?

10. Embed Maps in your App

12. Adding MapKit to your App

13. Adding MapKit to your App
Add the Mapkit & CoreLocation frameworks
Create a View Controller which implements
MKMapViewDelegate
Create an MKMapView instance and connect to the
controller

14. Setting the Position
Set the region property
Defines the center point and a span
Span defines the vertical & horizontal distance to
display

15. Setting the Position
- (void)viewDidLoad
{
MKCoordinateRegion region;
region.center.latitude = [eventVenue.latitude doubleValue];
region.center.longitude = [eventVenue.longitude doubleValue];
region.span.latitudeDelta = 0.0039;
region.span.longitudeDelta = 0.0034;
mapView.region = region;
}

16. Annotations

17. Annotations
Allow you to add places-of-interest to a Map
Implemented with a Model & a View

18. Annotation Models
Implement the MKAnnotation protocol
Exposes a Title, Subtitle, and Coordinate

20. Title

21. Title Subtitle

22. Title Subtitle
Coordinate

23. Annotation Views
Use MKAnnotationView
Easiest trick to set the image property
Use MKPinAnnotationView if you want the Pin

24. Managing Annotation Views
Managed like UITableViewCells

25. Managing Annotation Views
- (MKAnnotationView *)mapView:(MKMapView *)theMapView
viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *annotationView =
(MKPinAnnotationView *)([theMapView
dequeueReusableAnnotationViewWithIdentifier:@"annotation"]);
if (annotationView == NULL)
{
annotationView = [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:@"annotation"] autorelease];
annotationView.canShowCallout = YES;
annotationView.animatesDrop = YES;
}
annotationView.annotation = annotation;
return annotationView;
}

26. Geocoding

27. Geocoding
Convert Landmarks into Longitude/Latitude
and vice-versa
SDK 3.0 Supports Reverse Geocoding only

28. Reverse Geocoding
Use MKReverseGeocoder
Requires network access (Wifi/3G/EDGE)
Asynchronous lookups

29. Interacting with Core
Location

30. Showing the User’s Location
Set the showsUserLocation property on the
MapView instance
Implement an Annotation

31. Showing the User’s Location
- (void)viewDidLoad
{
// Other initialisation…
mapView.showsUserLocation = YES;
}

32. Showing the User’s Location
- (MKAnnotationView *)mapView:(MKMapView *)theMapView
viewForAnnotation:(id <MKAnnotation>)annotation
{
// Checks to see if we are going to add the annotation for the users's location.
// If this is the case, then we don't bother with creating an annotation and let
// the platform give us the blue dot.
if (annotation == mapView.userLocation) return nil;
// Configuring other annotations…
}

34. Resources
WWDC 2009: Sessions 118 & 119
LocateMe Sample Application
PragProg MapKit Screencast:
http://pragprog.com/screencasts/v-bdmapkit