Wordpress Blog iPhone App Reader [closed]
Here's what I would do, though I'm sure there are many solutions:
Get access to your WP blog as JSON instead of RSS (XML). In general, I've found the JSON libs to be much easier to work with than the XML libs in iOS. Here's the first plugin I came across, and it looks like it's an "API" instead of just a conversion of the feed. Hopefully this will give you more support for querying things like archives or specific posts or date ranges, etc.: http://wordpress.org/extend/plugins/json-api/
Decide if you want to load ALL content from each wp post, or just the titles. This kinda depends on how big each post is, how you're displaying them, etc. It might be quicker to just fetch + parse all the Post Titles and then make a subsequent query for a selected post's content.
Load the data with
NSMutableURLRequestandNSURLConnection, etc. Use the json-framework to parse this data, once you get it into your app (I found it through the Stanford iOS dev lectures). Quite easily converts a json string into a NSDictionary: https://github.com/stig/json-framework/As for loading all archives, ideally you can continually query for older posts with your wp json plugin, and maybe store the loaded post's timestamps on the device so that you don't need to fetch data more than once.
As for saving all this (including favorites), I'd look into using CoreData. http://developer.apple.com/library/ios/#documentation/DataManagement/Conceptual/iPhoneCoreData01/Introduction/Introduction.html
Push notifications are another beast entirely! I suppose the best approach would be to store push tokens of all your 'subscribers' somewhere on your server, then write some kind of php script that triggered your APNS service on an interval, checked for new posts, and sent out notifications accordingly.
Best of luck!
TouchJSON has native XML parsing support for Wordpress Blog RSS format. Try it out. You should be up and running in about an hour.
You can get TouchJSON from herehttps://github.com/TouchCode/TouchJSON