Getting Oriented with MapKit: Everything you need to get started with the new mapping framework.
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New in 3.0 Map Kit works with the Google Mobile Maps Service and features panning and zooming, custom annotations, current location and geocoding. This new framework opens up many new possibilities programs not previously possible. Come learn everything you need to know to get started as well as some tips and tricks to speed your programming along.
Transcript of Getting Oriented with MapKit: Everything you need to get started with the new mapping framework.
Why Maps?
• iPhone is a mobile / pocket computer
• Where am I?
• What’s near me?
• How do I get somewhere?
Dark ages (pre 3.0)
• Static map images
• Web view with Javascript shenanigans
• Exit out to google maps
MapKit
• New in iPhone 3.x
• Embed map in your app
• Uses Google map tiles
• Familiar map UI
Important Classes
MKMapView
MKAnnotation (protocol)
MKAnnotationView
Important Classes
MKMapView
MKMapViewDelegate
MKAnnotation (protocol)
MKAnnotationView
MKPinAnnotationView
Simplest Example
• MKMapView ... just a view
• Don’t forget to add mapkit framework
• Or use Interface Builder
That was easy
Show User Location
Center
Latitude Span
Longitude Span
“best fit” not exactly what you set
Showing a particular area on
the map
• MKCoordinateRegion
Regions
Denver, Colorado
Demo dataplist of Brewery information: name, address, latitude, longitude
Loading Demo Data
Local area
MKAnnotation
MyAnnotation Class
Adding Annotations
Default Pins at annotations
Customizing pins• MKPinAnnotationView
• MKMapViewDelegate - set a delegate
Our purple pins
Custom markers• MKAnnotationView
Customizing the view
Customizing the Callout
Tapping the call out view
Reverse Geocoding
• Geocoding : address to coordinates
• geocoder.us other services
• Reverse geocoding : coordinates to address
MKReverseGeocoder
MKPlacemark
• Address info including, country code, country, postal code, administrative area, sub administrative area, locality, sub locality, thoroughfare, sub thoroughfare
• Conforms to MKAnnotation
• Has address dictionary with Address Book keys
Number of pins• Try to limit
annotations to ~100(?)
• Implement region change delegate methods
• Create and manage your own clusters
Challenges• Anchoring an object to a location on the
map and having it scale.
• Shapes - neighborhoods
• Lines - routes / paths
• View space to Geo Space- (CGPoint)convertCoordinate:(CLLocationCoordinate2D)coordinate toPointToView:(UIView *)view
- (CLLocationCoordinate2D)convertPoint:(CGPoint)point toCoordinateFromView:(UIView *)view
Legal limitationsI’m not a lawyer but think carefully before using this for:
vehicle/fleet tracking
routing
cacheing tiles
geocoding / mass reverse geocoding
Read the TOS
http://code.google.com/apis/maps/iphone/terms.html
Possible Options
• OpenStreetMap.org (OSM) - map/tile data
• Route-Me - OSS map view
• Cloudemade.com - services around OSM
• geocoder.us (among others)
Resources
• MapKit Framework Reference - Apple
• Using Map Kit with Bill Dudney - PragProg
• Using Map Kit ... Bill Dudney - Wednesday
Thank You
Julio Barros
http://www.E-String.com
http://twitter.com/JulioBarros
Also on Face book and Linked In
