几天来，我一直在想如何在cocoa和objective C中解析这个xml文档。我已经将它加载到NSXMLDocument中，并能够获得节点。
<MediaContainer noHistory="0" replaceParent="0" size="4" identifier="com.plexapp.system">
<Directory key="aHR0cDovLzE5Mi4xNjguMS45OTozMjQwMC9saWJyYXJ5L3NlY3Rpb25zLzI_" art="2/art?updatedAt=1344035442" unique="1" name="3D Movies" title="3D Movies" type="movie" serverVersion="0.9.6.7.204-266f05d" host="192.168.1.99" serverName="Eddard" path="/library/sections/2" machineIdentifier="2dddaaedb46a722cf74695c19a7d3947bbeebfd2" local="1" port="32400"/>
<Directory key="aHR0cDovLzE5Mi4xNjguMS45OTozMjQwMC9saWJyYXJ5L3NlY3Rpb25zLzE_" art="1/art?updatedAt=1344035443" unique="1" name="Movies" title="Movies" type="movie" serverVersion="0.9.6.7.204-266f05d" host="192.168.1.99" serverName="Eddard" path="/library/sections/1" machineIdentifier="2dddaaedb46a722cf74695c19a7d3947bbeebfd2" local="1" port="32400"/>
<Directory key="aHR0cDovLzE5Mi4xNjguMS45OTozMjQwMC9saWJyYXJ5L3NlY3Rpb25zLzQ_" art="4/art?updatedAt=1344035444" unique="1" name="Super Audio CDs" title="Super Audio CDs" type="movie" serverVersion="0.9.6.7.204-266f05d" host="192.168.1.99" serverName="Eddard" path="/library/sections/4" machineIdentifier="2dddaaedb46a722cf74695c19a7d3947bbeebfd2" local="1" port="32400"/>
<Directory key="aHR0cDovLzE5Mi4xNjguMS45OTozMjQwMC9saWJyYXJ5L3NlY3Rpb25zLzM_" art="3/art?updatedAt=1344037454" unique="1" name="TV Shows" title="TV Shows" type="show" serverVersion="0.9.6.7.204-266f05d" host="192.168.1.99" serverName="Eddard" path="/library/sections/3" machineIdentifier="2dddaaedb46a722cf74695c19a7d3947bbeebfd2" local="1" port="32400"/>
</MediaContainer>
使XML文档变得棘手的是，每个节点都有几个属性。所以当我去[node XMLString]时，我会得到完整的字符串，这仍然没有意义。是从节点中提取单个属性的一种方法吗？例如，类似于名为getAttribute（String）的java XML方法，它允许我为字符串参数输入属性名称并返回绑定到它的值，例如getAttribute（"Size"）将返回值为4的字符串。
如有任何帮助，我们将不胜感激。
如果使用NSXMLParser，可以使用以下NSXMLParserDelegate方法来获取XML元素的属性：
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
if ([elementName isEqualToString:@"MediaContainer"]) {
NSString *size = [attributeDict objectForKey:@"size"];
}
}