iOS XMl的创建与解析

    //创建根节点

    GDataXMLElement *rootElement = [GDataXMLNode elementWithName:@"abCASD"];

    //创建第一个子节点

    GDataXMLElement *element = [GDataXMLNode elementWithName:@"name123" stringValue:@"东方红"];

    //添加子节点到根节点上

    [rootElement addChild: element];

    //使用根节点创建xml文档

    GDataXMLDocument *rootDoc = [[GDataXMLDocument alloc] initWithRootElement:rootElement];

    //设置使用的xml版本号

    [rootDoc setVersion:@"1.0"];

    //设置xml文档的字符编码

    [rootDoc setCharacterEncoding:@"utf-8"];

    

    //获取并打印xml字符串

    NSString *str = [[NSString alloc] initWithData:rootDoc.XMLData encoding:NSUTF8StringEncoding];

    NSLog(@"%@", str);

    

    

    //解析XML

    GDataXMLElement *root = [rootDoc rootElement];

    for (int i=0; i <[rootElement childCount]; i++) {

        

        //GDataXMLElement *element = (GDataXMLElement *)[root childAtIndex:i];

        NSLog(@"ROOT Element Name = %@", root.name);

        NSLog(@"ROOT Type = %@", [[root attributeForName:@"type"] stringValue]);

        

        

        GDataXMLElement *element = (GDataXMLElement *)[root childAtIndex:i];

        NSLog(@"Element Name = %@", element.name);

        NSLog(@"Type = %@", [[element attributeForName:@"type"] stringValue]);

        for (int j=0; j<[element childCount]; j++) {

            

            GDataXMLElement *subItem = (GDataXMLElement *)[element childAtIndex:j];

            NSLog(@"Sub Name = %@", subItem.name);

            NSLog(@"Sub value = %@", subItem.stringValue);

        }

    }

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/**  解析webservice返回的XML成一个NSDictionary  参数：content ,要解析的数据  参数：path   ,要解析的XML数据一个根节点  返回：NSDictionary  */ + (NSDictionary *)getWebServiceXMLResult:(NSString *) content xpath:(NSString *)path {     NSMutableDictionary *resultDict = [[NSMutableDictionary alloc] init];     content =  [content stringByReplacingOccurrencesOfString:@"&lt;" withString:@"<"];     content =  [content stringByReplacingOccurrencesOfString:@"&gt;" withString:@">"];            content = [content stringByReplacingOccurrencesOfString:@"xmlns" withString:@"noNSxml"];     NSError *docError = nil;     GDataXMLDocument *document = [[GDataXMLDocument alloc] initWithXMLString:content options:0 error:&docError];     if(!docError)     {         NSArray *children = nil;         children = [document nodesForXPath:[NSString stringWithFormat:@"//%@",path] error:&docError];         if(!docError)         {             if(children && [children count]>0)             {                 GDataXMLElement *rootElement = (GDataXMLElement *)[children objectAtIndex:0];                 NSArray *nodearr = [rootElement children];                 for (int i = 0; i<[nodearr count]; i++) {                     GDataXMLElement *element = (GDataXMLElement *)[nodearr objectAtIndex:i];                     [resultDict setObject:[element stringValue] forKey:[element name]];                 }             }         }     }     [document release];     return [resultDict autorelease]; }