Changes

Depending on the specific device model, the iPad is able to employ a number of different techniques for obtaining information about the current geographical location of the device. These mechanisms include GPS, cell tower triangulation and finally (and least accurately), by using the IP address of available Wi-Fi connections. The mechanism that is used by iOS to detect location information is, however, largely transparent to the application developer and the system will automatically use the most accurate solution that is available at any given time. In fact, all that is needed to integrate location based information into an iOS 4 iPad application is an understanding of how to use the Core Location Framework which will be covered in this chapter