If I want my iOS application to use a RESTful WebService that returns XML data, which APIs do I want to start learning?

Question

I would like to create some weather functions in my application, and I will use the NOAA web weather service to get weather information. The NOAA website has extensive information on how to request data and how the resulting data is structured. I'm new to iOS development, so I just need a little tutorial because I'm not sure which APIs I should use to request and process this data. My questions...

• What is the correct way to request access to a user's location?
• If a user allows access to their location, which APIs would I use to access it?
• To make an HTTP request to a RESTful web service, which APIs should I use?
• To process / analyze the received XML data, which API should I use?

And if anyone can offer any good examples on the Internet demonstrating any of these features, this would also be helpful.

Thank you very much for your wisdom!

Answer 1

For location data, look at CoreLocation
http://developer.apple.com/iphone/library/documentation/CoreLocation/Reference/CoreLocation_Framework/index.html

For HTTP requests, I like to use the ASIHTTPRequest class
http://allseeing-i.com/ASIHTTPRequest/

TouchXML simplifies working with XML data
http://code.google.com/p/touchcode/wiki/TouchXML

Answer 2

Just today, Luke Redpath published the full iPhone REST client that he wrote. I can not vouch for this, I just saw today that it exists. But Luke does a good job, so I find it pretty decent.

See here: http://lukeredpath.co.uk/blog/some-code-that-i-wrote.html