Geolocation in iOS

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Hardware Support 1
Detecting Hardware Differences 2
GPS Availability 2
Compass Availability 2
Setting Required Hardware Capabilities 3
Background Modes 3
2. Core Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
The Standard Location Service 5
Basic Usage 6
Reporting the User’s Position 7
Adding a User Interface 11
Significant Location Monitoring 16
Continuous Location Monitoring 18
Sending Your Location to a Database 20
Region Monitoring 31
Adding Region Monitoring 31
Adding Local Notifications 33
3. Map Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Adding a Map 37
Annotating Maps 45
Adding Overlays 48
4. Digital Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
About the Magnetometer 51
Writing a Compass Application 53
Determining the Heading in Landscape Mode 56

5. Geocoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Reverse Geocoding 63
Using Alternative Reverse Geocoding Services 64
Forward Geocoding 64
Building an Example App 65
CLPlacemark Objects 74
Adding CLPlacemarks to Maps 74
6. Drawing Heat Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Building an Earthquake Map 81
Adding Earthquake Data 82
Building the User Interface 84
Adding the Overlay 85
Adding the Heat Map 89
Overlaying Other Data 92
Overlaying Other Types of Images 94
7. Further Information and Third-Party SDKs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Skyhook Wireless 97
SpotRank 97
Local Faves 98
GeoLoqi 98
MapBox 98
Bing Maps Control for iOS 99
ArcGIS for iOS 100
Urban Airship 102
Foursquare 102