我正在使用NSXmlParser来解析RSS Feed.到目前为止一切运作良好.
我预计RSS Feed最终会包含几十个/几百个帖子.我目前的解决方案是读取整个RSS Feed并显示结果.但是我想只阅读前十个帖子(以防止它解析可能有数百个项目).然后在稍后的时间(例如当用户到达表的末尾时)来解析接下来的十个帖子.
所以我的问题是如何解析前十个帖子,然后解析接下来的十个帖子,然后解析接下来的十个帖子等等……
- (void)parseXMLFileAtURL:(NSString *)URL
{
myArray = [[NSMutableArray alloc] init];
//convert the path to a proper NSURL or it won't work
NSURL *xmlURL = [NSURL URLWithString:URL];
RSSParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
[RSSParser setDelegate:self];
[RSSParser parse];
}
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {
//error
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
currentElement = [elementName copy];
if ([elementName isEqualToString:@"item"]) {
//clear out our story item caches...
item = [[NSMutableDictionary alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
if ([elementName isEqualToString:@"item"]) {
// save values to an item,then store that item into the array...
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
// save the characters for the current item...
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[myTable reloadData];
}