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Sams Teach Yourself iPhone Application Development in 24 Hours by John Ray, Sean Johnson

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Hour 22. Implementing Map and Location Services

What You’ll Learn in This Hour:

Finding the device with Core Location

Showing the way with Map Kit

Orienting with the compass

In addition to being a cell phone, and a handy pocket computer, an iPhone is an amazing navigation device (see Figure 22.1). It’s so proficient at this task it would give science fiction writers of 30 years ago a good shock. Having an iPhone is like having a whole store’s worth of maps and guidebooks tucked away in your pocket or purse.

Figure 22.1. From left to right: directions from Apple’s Maps application, restaurants from Tweakersoft’s AroundMe application and GPS data from MotionX GPS.

In this hour, we work with three navigation-related services ...

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