Parsing RSS feed - retrieve images, urls? - iphone

Question

Hello I am parsing a RSS And Atom feeds, and my question is how can I check for < img > and < url > tags in < description >?
There must be some sort of check. Thanks.
Here is how I parse them:
- (NSArray *)parseFeed:(NSURL *)feedURL{
NSError *error;
NSData *data = [NSData dataWithContentsOfURL:feedURL];
GDataXMLDocument *xmlParse = [[GDataXMLDocument alloc] initWithData:data error:&error];
GDataXMLElement *rootElement = xmlParse.rootElement;
NSArray *array = [[NSArray alloc] init];
if ([rootElement.name compare:#"rss"] == NSOrderedSame) {
array = [self parseRSSFeed:rootElement];
return array;
} else if ([rootElement.name compare:#"feed"] == NSOrderedSame) {
array = [self parseAtomFeed:rootElement];
return array;
} else {
NSLog(#"Unsupported root element: %#", rootElement.name);
return nil;
}
}
-(NSArray *)parseRSSFeed:(GDataXMLElement *) rootElement
{
NSMutableArray *entries = [[NSMutableArray alloc] init];
NSArray *channels = [rootElement elementsForName:#"channel"];
for (GDataXMLElement *channel in channels) {
NSArray *items = [channel elementsForName:#"item"];
for (GDataXMLElement *item in items) {
FeedItem *itemF = [[FeedItem alloc] init];
itemF.title = [item valueForChild:#"title"];
itemF.description = [item valueForChild:#"description"];
NSLog(#"IMAGE - %#", [item valueForChild:#"img"]);
itemF.dateString = [item valueForChild:#"pubDate"];
itemF.link = [NSURL URLWithString:[item valueForChild:#"link"]];
itemF.dateString = [item valueForChild:#"updated"];
itemF.author = [item valueForChild:#"author"];
[entries addObject:itemF];
NSLog(#"RSS - %#", itemF.title);
}
}
NSArray *RSSArray = [entries copy];
return RSSArray;
}
-(NSArray *)parseAtomFeed:(GDataXMLElement *) rootElement
{
NSMutableArray *entries = [[NSMutableArray alloc] init];
NSArray *entry = [rootElement elementsForName:#"entry"];
for (GDataXMLElement *entryElement in entry) {
// NSArray *items = [channel elementsForName:#"item"];
//for (GDataXMLElement *item in items) {
FeedItem *itemF = [[FeedItem alloc] init];
itemF.title = [entryElement valueForChild:#"title"];
itemF.description = [entryElement valueForChild:#"summary"];
NSArray *links = [entryElement elementsForName:#"link"];
for (GDataXMLElement *link in links) {
itemF.link = [NSURL URLWithString:[[link attributeForName:#"href"] stringValue]];
}
itemF.dateString = [entryElement valueForChild:#"updated"];
NSArray *authors = [entryElement elementsForName:#"author"];
for (GDataXMLElement *authorElement in authors) {
itemF.author = [authorElement valueForChild:#"name"];
}
[entries addObject:itemF];
NSLog(#"Atom - %#", itemF.title);
}
NSArray *atomArray = [entries copy];
return atomArray;
}
I am parsing them using GDataXMLParser, and my own parser class.

Answer 1

Do it like this:
NSString *Str=[item valueForChild:#"description"];
NSArray *tmp=[Str componentsSeparatedByString:#"<Img>"];
if([tmp count]>1){
NSString *urlstr=[[tmp objectatindex:1] stringByReplacingOccurrencesOfString:#" </Img>" withString:#""];
}
Now urlstr contains your image url.
Enjoy

Answer 2

I thought that
itemF.description = [item valueForChild:#"description"];
is NSString. So you can use componentsSeparatedByString with "your tag".
It will return array. In array at postion 1 you will get your img url.
This url has closing bracket "your closing tag".
Replace "your closing tag" with space. You will get image url.
Hope, this will help you.