Question

我正在测试我正在使用这样的RSS源构建新闻Feed iOS应用：http://www.20minutos.es/iphoneapp/feeds/home/

我差不多完成了，但我找不到缩略图的链接。我正在进行这样的解析，我可以找到一些机箱，enclosure2x，缩略图，thumbnail2x，但它们都是空字符串：

- (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];
        image = [[NSMutableString alloc] init];
        image2x = [[NSMutableString alloc] init];
        comments = [[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:image forKey:@"image"];
        [item setObject:image2x forKey:@"image2x"];
        [item setObject:comments forKey:@"comments"];
        [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:@"veinteminutos:numComments"]) {
        [comments appendString:[string stringByReplacingOccurrencesOfString:@" " withString:@""]];
    }
    //NSLog(@"string: %@ \nelement: %@ \n\n\n", string, element);

}

这是我第一次解析rss feed，所以我真的不知道该在那里寻找什么。

由于

Answer 1

您应该解析media:thumbnail委托方法中的media:thumbnail2x和parser:didStartElement:namespaceURI:qualifiedName:attributes:节点，并从attributeDict字典中提取缩略图网址：

- (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];
        image = [[NSMutableString alloc] init];
        image2x = [[NSMutableString alloc] init];
        comments = [[NSMutableString alloc] init];
    } else if ([element isEqualToString:@"media:thumbnail"]) {
        image = [attributeDict objectForKey:@"url"];
    } else if ([element isEqualToString:@"media:thumbnail2x"]) {
        image2x = [attributeDict objectForKey:@"url"];
    }
}

如果需要，您可以对机箱执行相同操作。

在RSS Feed中找不到缩略图元素

1 个答案: