iOS apps, when connected to the Internet, become more lively. For example, imagine an app that brings high quality wallpapers to its users. The user can pick from a big list of wallpapers and assign any of those images as his iOS background. Now consider an app that does the same thing, but adds to its list of wallpapers every day, week, or month. The user comes back to the app and voilá! Tons of new wallpapers are dynamically added to the app. That is the magic of web services and the Internet. This can easily be achieved with basic knowledge of networking, XML, JSON, and Twitter connectivity along with some creativity on the app developer’s part.
iOS SDK allows us to connect to the Internet and retrieve and send
data using the
JSON serialization and deserialization will all be done using the
NSJSONSerialization class. XML
parsing will be done using
NSXMLParser, and the Twitter connectivity will
be done using the Twitter framework.