An application that sits will just do that. It has no idea about the outside world, no idea about anyone trying to contact them, and moreover, no idea about where it is. In the last chapter, we looked at how to use the address book. In this chapter, we will expand on this, use some of the hardware facilities, and communicate with the outside world via push notifications.
In this chapter, we will:
Learn how to implement push notifications
Incorporate maps and GPS with your app