NSXMLParser解析属性

Question

如何使用NSXML解析器从XML中提取属性？以下是我的XML示例：

<item>
<title>Button hails 'amazing' win</title>
<description>Jenson Button hailed yesterday's crazy Canadian Grand Prix victory as the best of his Formula One career.
</description>
<link>http://www.skysports.com/story/0,19528,12433_6986809,00.html</link>
<guid isPermaLink="false">12433_6986809</guid>
<pubDate>Mon, 13 Jun 2011 06:21:00 GMT</pubDate>
<category>News Story</category>
<enclosure type="image/jpg" url="http://img.skysports.com/11/06/128x67/Canadian-GP-Jenson-Button-celebrates1_2609288.jpg" length="123456" />
</item>

我需要从附件标签中获取URL。

谢谢。

- MrPink

Answer 1

if([elementName isEqualToString:@"enclosure"])
{
    NSString *urlValue=[attributeDict valueForKey:@"url"];
    NSString *urlValue=[attributeDict valueForKey:@"type"];
    NSString *urlValue=[attributeDict valueForKey:@"length"];
}

- Gypsa

---

感谢您的回答。我想补充一下，这些代码行应该放在NSXMLParser的代理方法中： - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict。 - Neeku

让我开心了...太简单了..:) - davidOhara

Answer 2

你需要使用NSXMLParser及其委托函数来完成。

 (BOOL) parse:(NSData *)xmlData 


-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{         



}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{   

}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{

}

那么您需要使用类似于这样的东西。

if([elementName isEqualToString:@"enclosure"])
    {
        NSMutableDictionary *Dict=[NSMutableDictionary dictionary];
        [Dict setObject:[attributeDict valueForKey:@"url"] forKey:@"url"];
        [categoryDict setObject:[attributeDict valueForKey:@"type"] forKey:@"type"];

    }

- Ishu

Answer 3

这个方法...

(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName 
  namespaceURI:(NSString *)namespaceURI 
 qualifiedName:(NSString *)qualifiedName 
    attributes:(NSDictionary *)attributeDict

提供一个属性和它们的键（attributeDict）字典...当elementName等于“enclosure”时，查找一个以“url”为键的条目...

- Simon Lee

Answer 4

这是一个解释： 带有属性的 XML 示例：

使用XML委托方法：

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName 
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
attributes:(NSDictionary *)attributeDict
 {
    if ([elementName isEqualToString:@"remoteContent"]){
        NSString* href = [attributeDict objectForKey:@"href"];
        NSLog(@"href %@",href);
       [someArray addObject:href];
  }
}

- Nagarjun