Web Services and UIWebView - iOS Programming: The Big Nerd Ranch Guide - page 692

currentString = [[NSMutableString alloc] init];
[self setTitle:currentString];
}
else if ([elementName isEqual:@"description"]) {
currentString = [[NSMutableString alloc] init];
[self setInfoString:currentString];
}
}
Note that currentString points at the same object as the appropriate instance variable
- either title or infoString ( Figure 25.9 ).
Figure 25.9 Two variables pointing at the same object
This means that when you append characters to the currentString , you are also ap-
pending them to the title or to the infoString .
In RSSChannel.m , implement the parser:foundCharacters: method.
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)str
{
[currentString appendString:str];
}
When the parser finds the end of the channel element, the channel object will return
control of the parser to the ListViewController . Implement this method in
RSSChannel.m .
- (void)parser:(NSXMLParser *)parser
didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName
{
// If we were in an element that we were collecting the string for,
// this appropriately releases our hold on it and the permanent ivar keeps
// ownership of it. If we weren't parsing such an element, currentString
// is nil already.
currentString = nil;
// If the element that ended was the channel, give up control to