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iOS devices are 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 available at any given time. In fact, all that is needed to integrate location based information into an iOS application is an understanding of how to use the Core Location Framework which, incidentally, is the subject of this chapter.
Once the basics of location tracking with Core Location have been covered in this chapter, the next chapter will provide detailed steps on how to create [[A Swift Example iOS 8 Location Application|An Example iOS 11 Location Application]].
== The Core Location Manager ==
