Finding image in RSS feed - iOS - ios

Question

I am making an app for my site, which I need to include images in the table view.
RSS picture I'm trying to find:
<description>
<![CDATA[
<img width="1100" height="1010" src="http://www.x86cam.com/wp-content/uploads/2013/11/twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u.png" class="attachment- wp-post-image" alt="twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u" style="display: none" />I will not give any links, but I just need to warn y’all. Watch out for spoilers all over sites. Source: Here
]]>
</description>
I don't know how I would find the image tag in this.
#pragma mark - parsing of RssFeed Values
-(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
element = elementName;
if ([element isEqualToString:#"item"]) {
item = [[NSMutableDictionary alloc]init];
title = [[NSMutableString alloc]init];
link = [[NSMutableString alloc] init];
desc = [[NSMutableString alloc] init];
image = [[NSMutableString alloc] init];
pubDate = [[NSMutableString alloc] init];
}
}
-(void) parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
if ([elementName isEqualToString:#"item"]) {
[item setObject:title forKey:#"title"];
[item setObject:link forKey:#"link"];
[item setObject:desc forKey:#"description"];
[item setObject:pubDate forKey:#"pubDate"];
[feeds addObject:[item copy]];
}
}
-(void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
if ([element isEqualToString:#"title"]) {
[title appendString:string];
}else if ([element isEqualToString:#"link"]){
[link appendString:string];
}else if ([element isEqualToString:#"description"]){
[desc appendString:string];
}else if ([element isEqualToString:#"pubDate"]){
[pubDate appendString:string];
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[self.tableView reloadData];
}
I would like the app to parse the XML and find the <img> tag in the <description> and then get the src=""
Anyone willing and able to help me on this?

Answer 1

The image link your are looking to extract is inside a CDATA block, but rss parser ignores CDATA block.
If you need to extract the string from CDATA, you could use this block in foundCDATA:
- (void)parser:(NSXMLParser *)parser foundCDATA:(NSData *)CDATABlock
{
NSMutableString *cdstring = [[NSMutableString alloc] initWithData:CDATABlock encoding:NSUTF8StringEncoding];
}
now the mutablestring "cdstring" will be containing:
"img width="1100" height="1010" src="http://www.x86cam.com/wp-content/uploads/2013/11/twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u.png" class="attachment- wp-post-image" alt="twilight_sparkle_with_the_twicane_by_diamondsword11-d6vn28u" style="display: none" />I will not give any links, but I just need to warn y’all. Watch out for spoilers all over sites. Source: Here"
now just search for src=" using stringcontainsstring and extract the link
-cheers :)
P.S: if you can ask the provider of rss feed to give it in normal block without CDATA, you can extract the link easily by using following method:
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes: (NSDictionary *)attributeDict
// In this method parameter 'attributeDict' will return you all the sub attributes of main attribute.
// In your case its 'url' of Picture.
// I hope this will help you. Check this out.
if ([element isEqualToString:#"img"]){
[attributeDict valueForKey:<#"src">]
}
Hope it helps