how to use TouchXML

iphoen do not have NSXML* librarys, wo can instead with touchxml,TouchXML is a lightweight replacement for Cocoa’s NSXMLcluster of classes. It is based on the commonly available Open Source libxml2 library.

1. Getting the TouchXML Libraries

you can dowload  TouchXML library from TouchCode

2. add  TouchXML Libraries to your project

find the guid here TouchXMLHowTo

3. use  TouchXML in your project

 

#import "TouchXML.h"


// grabRSSFeed function that takes a string (blogAddress) as a parameter and
// fills the global blogEntries with the entries
-(void) grabRSSFeed:(NSString *)blogAddress {

// Initialize the blogEntries MutableArray that we declared in the header
blogEntries = [[NSMutableArray alloc] init];

// Convert the supplied URL string into a usable URL object
NSURL *url = [NSURL URLWithString: blogAddress];

// Create a new rssParser object based on the TouchXML "CXMLDocument" class, this is the
// object that actually grabs and processes the RSS data
CXMLDocument *rssParser = [[[CXMLDocument alloc] initWithContentsOfURL:url options:0 error:nil] autorelease];

// Create a new Array object to be used with the looping of the results from the rssParser
NSArray *resultNodes = NULL;

// Set the resultNodes Array to contain an object for every instance of an  node in our RSS feed
resultNodes = [rssParser nodesForXPath:@"//item" error:nil];

// Loop through the resultNodes to access each items actual data
for (CXMLElement *resultElement in resultNodes) {

// Create a temporary MutableDictionary to store the items fields in, which will eventually end up in blogEntries
NSMutableDictionary *blogItem = [[NSMutableDictionary alloc] init];

// Create a counter variable as type "int"
int counter;

// Loop through the children of the current  node
for(counter = 0; counter < [resultElement childCount]; counter++) {

// Add each field to the blogItem Dictionary with the node name as key and node value as the value
[blogItem setObject:[[resultElement childAtIndex:counter] stringValue] forKey:[[resultElement childAtIndex:counter] name]];
}

// Add the blogItem to the global blogEntries Array so that the view can access it.
[blogEntries addObject:[blogItem copy]];
}
}