iPhone开发 解析xml NSData

xml字符串为：

<users>
<user name="hoge" age="20" />
<user name="fuga" age="30" />
</users>

//解析按钮事件

-(IBAction)btnXml

{

    NSString* str= [uitextview1 text];

    //string转成data

    NSData *xmlData = [str dataUsingEncoding: NSUTF8StringEncoding];

    //对xml进行解析需要使用NSXMLParser类，首先声明一个NSXMLParser对象   

    //开始解析 

    NSXMLParser* xmlRead = [[NSXMLParser alloc] initWithData:xmlData];//初始化NSXMLParser对象  

    [xmlRead setDelegate:self];//设置NSXMLParser对象的解析方法代理 

    [xmlRead parse];//调用代理解析NSXMLParser对象，看解析是否成功     

}

//解析器，从两个结点之间读取内容

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

    //NSLog(@"%@",string);}

//获得结点结尾的值

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName

  namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {

    //NSLog(@"%@",elementName);}

//获得结点头的值

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName

  namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName

    attributes:(NSDictionary *)attributeDict

{

    //NSLog(@"%@",elementName);

    if([elementName isEqualToString: @"user"])

    {

        NSString* strName=[attributeDict valueForKey:@"name"];

        NSString* strAge=[attributeDict valueForKey:@"age"];

        NSString* strUser=uitextview2.text;

        strUser=[strUser stringByAppendingFormat:@"姓名：%@,年龄：%@\n",strName,strAge];

        [uitextview2 setText:strUser];

        //NSLog(@"姓名：%@,年龄：%@", strName,strAge);

    }

}