Re: Noob question in regards to NSXMLParser
Re: Noob question in regards to NSXMLParser
- Subject: Re: Noob question in regards to NSXMLParser
- From: Jens Alfke <email@hidden>
- Date: Tue, 07 Jun 2011 11:03:47 -0700
On Jun 7, 2011, at 7:03 AM, Eric E. Dolecki wrote:
> What I am really after is the current_conditions data. How can one specify
> WHERE in the XML to use the attributes from? A lot of the information is
> repeated in other nodes so I can't just check (if([elementName
> isEqualToString:@"condition"]){) , how can I check if the current element is
> within a specific tag? (In this case the parent is current_conditions)?
You _totally_ want to use XPath for this. It lets you write a simple query string that fetches arbitrarily nested data. What you’re asking for is a one-liner. There is a little bit of a learning curve for learning the syntax, but it’s really worth it (you can find online tutorials pretty easily by searching.)
So instead of NSXMLParser, use the higher level NSXMLDocument (which can even fetch the URL for you) and then use the XPath methods on it.
[Um, except now it occurs to me that you didn’t specify what OS you’re on, and last I heard iOS didn’t have NSXMLDocument yet… If you’re using iOS, it’s best to specify that explicitly, since a lot of us old crusties here will assume OS X unless otherwise stated.]
—JensAttachment:
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