Search for XML feeds usind Iphone - iphone

Question

hi can anyone give me hint of how to start coding for an app to search the internet and find the rss xml url's using a string provided by the user.
thanks upfront.

Answer 1

You need to use XML parsing to implement this.I suggest use touchXML
-(void)callwebservice{
NSString *path = #"YOUR URL";
[self grabRSSFeed:path];
}
pragma mark -
pragma mark Touch XML
pragma mark -
-(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:#"//Node you want to parse" 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]];
NSLog(#"Data = %#",[[resultElement childAtIndex:counter] stringValue]);
}
// Add the blogItem to the global blogEntries Array so that the view can access it.
[blogEntries addObject:[blogItem copy]];
}
[YourTable reloadData];
}
Import touchXML library in you header file.
Thanks