無法找到RSS提要

Question

我做一個測試，我建立一個新聞提要iOS應用的縮略圖要素，使用RSS提要像這樣的：http://www.20minutos.es/iphoneapp/feeds/home/

我幾乎已經完成，但我找不到縮略圖的鏈接。我做這樣的分析，我可以找到一些外殼，enclosure2x，縮略圖，thumbnail2x，但他們都空字符串：

- (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); 

} 

這是我第一次解析RSS提要，所以我真的不知道在那裏尋找什麼。

感謝

Answer 1

你應該分析出media:thumbnail和media:thumbnail2x節點在parser:didStartElement:namespaceURI:qualifiedName:attributes:委託方法，並從attributeDict字典中提取縮略圖URL：

- (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"]; 
    } 
} 

可以爲機箱做同樣的，應你需要他們。