创建XML：
//创建XML
GDataXMLElement *rootElement = [GDataXMLNode elementWithName:@"request"];
GDataXMLElement *element = [self getElementWithName:@"peter" withAge:@"24" withSex:@"male"withAttribute:@"0"];
[rootElement addChild:element];
element = [self getElementWithName:@"Green" withAge:@"26" withSex:@"female"withAttribute:@"1"];
[rootElement addChild:element];
element = [self getElementWithName:@"Susan" withAge:@"28" withSex:@"female"withAttribute:@"1"];
[rootElement addChild:element];
GDataXMLDocument *document = [[GDataXMLDocument alloc]initWithRootElement:rootElement];
NSData *data = [document XMLData];
NSString *content = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(content);
解析xml
NSData *xmlData = [xml dataUsingEncoding:NSUTF8StringEncoding];
//使用NSData对象初始化
GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:xmlData options:0 error:nil];
//获取根节点（Users）
GDataXMLElement *rootElement = [doc rootElement];
GDataXMLElement *nameElement = [[rootElement elementsForName:@"RSPCOD"] objectAtIndex:0];
NSString *name = [nameElement stringValue];
NSLog(@"RSPCOD name is:%@",name);
GDataXMLElement *trandetailsElement = [[rootElement elementsForName:@"TRANDETAILS"] objectAtIndex:0];
//获取根节点下的节点（User）
NSArray *users = [trandetailsElement elementsForName:@"TRANDETAIL"];
for (GDataXMLElement *user in users) {
//User节点的id属性
NSString *userId = [[user elementsForName:@"BRAACTNO"] objectAtIndex:0];
NSLog(@"User id is:%@",userId);
//获取name节点的值
GDataXMLElement *nameElement = [[user elementsForName:@"MERNAM"] objectAtIndex:0];
NSString *name = [nameElement stringValue];
NSLog(@"User name is:%@",name);
//获取age节点的值
GDataXMLElement *ageElement = [[user elementsForName:@"OPNBNK"] objectAtIndex:0];
NSString *age = [ageElement stringValue];
NSLog(@"User age is:%@",age);
NSLog(@"-------------------");
}