13. Networking
As an Internet-connected device, the iPhone is particularly well suited to retrieving remote data and subscribing to Web-based services. Apple has lavished the platform with a solid grounding in all kinds of network computing and its supporting technologies. The iPhone SDK handles sockets, password keychains, XML processing, and more. This chapter surveys common techniques for network computing, offering recipes that simplify day-to-day tasks. You read about checking the network status, monitoring that status for changes, and testing site reachability. You also learn how to download resources asynchronously and how to respond to authentication challenges. By the time you finish this chapter, you’ll have discovered how to build ...
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