As an Internet-connected device, the iPhone and its other iOS family members are particularly well suited to retrieving remote data and accessing web-based services. Apple has lavished the platform with a solid grounding in all kinds of network computing and its supporting technologies. The Networking chapter in the Core Cookbook introduced network status checks, synchronous and asynchronous downloads, JSON, and XML parsing. This chapter continues that theme by introducing more advanced techniques. These include authentication challenges, using the system keychain, working with OAuth, and so forth. Here are handy approaches that should help with your development.
Recipe: Secure Credential Storage
Before diving into actual networking, ...