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This is the second of a two part post looking at the reading and parsing of a remote RSS feed. The first post covered the retrieval of the feed data over the network. This part will look at how to parse the resulting XML data to extract the individual posts. Structure of an RSS feed Before we get too much into the detail it is worth taking a second to look at the structure of an RSS feed. A typica
The keychain is about the only place that an iPhone application can safely store data that will be preserved across a re-installation of the application. Each iPhone application gets its own set of keychain items which are backed up whenever the user backs up the device via iTunes. The backup data is encrypted as part of the backup so that it remains secure even if somebody gets access to the back
When I wrote about local notifications one thing that I left out was the ability to schedule a repeating notification. One of the reasons I did not bother to mention the ability to set a repeat interval is that the function is very limited. At least it is with iOS 4.1 at the time of writing. To show what can and can not be done I will modify the original sample app to include the ability to set a
The Apple Push Notification Service (APNS) was released way back in iOS 3.0. That was only just over a year ago but given the pace of development in the mobile OS market that now seems like ancient history. APNS was a first tentative attempt by Apple to address the demand for background processes. It allows client applications to receive updates from a server without having to be running. Apple ta
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