iOS 解析xml

- (IBAction)DoParser:(id)sender {
    
    self.xmlString=@"<?xml version=\"1.0\" encoding=\"UTF-8\"?><root><person id=\"1\"><firstname>尤1</firstname><secondname>吴1</secondname></person><person id=\"2\"><firstname>尤2</firstname><secondname>吴2</secondname></person></root>";
    
    NSData *xmldata=[[NSData alloc]init];
    xmldata=[self.xmlString dataUsingEncoding:NSUTF8StringEncoding];
    
    self.xmlParser=[[NSXMLParser alloc]initWithData:xmldata];
    
    [self.xmlParser setDelegate:self];
    
    
    [self.xmlParser parse];
    
}

//开始解析
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    NSLog(@"开始处理元素：%@",elementName);
    //可获取元素属性
    if ([elementName isEqualToString:@"person"]) {
        NSLog(@"attributes:%@",[attributeDict objectForKey:@"id"]);
    }
    
}

//完成解析
- (void)parserDidEndDocument:(NSXMLParser *)parser{
    if (self.soapResults) {
        self.soapResults=nil;
    }
}

//元素内的内容
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    if (string) {
        self.soapResults=string;
    }
}

//结束该元素解析后的操作
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if ([elementName isEqualToString:@"person"]) {
        //NSLog(@"%@",[NSString stringWithFormat:@"%@",self.soapResults ]);
    }
    NSLog(@"%@:%@",elementName,self.soapResults);
}

//报错时的操作
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError
{
    NSLog(@"%@",parseError);
    if (self.soapResults) {
        self.soapResults=nil;
    }
}