ios - 如何获取 XML 元素并存储它？ objective-c

Question

我正在尝试从网站获取 token 。身份验证成功后，将显示一个 XML 文档。

我创建了如下所示的连接:

NSString *strURLQueryString = [NSString stringWithFormat:@"%@?username=%@&password=%@", kURL_LOGIN, nameString, passwordString];
    NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:strURLQueryString]
                                                cachePolicy:NSURLRequestUseProtocolCachePolicy
                                            timeoutInterval:60.0];

为了显示输出，我使用了这个:

unsigned char byteBuffer[[receivedData length]];
[receivedData getBytes:byteBuffer];
NSLog(@"Output: %s", (char *)byteBuffer);

所以返回文档的部分输出如下图:

    <status>0</status><reason>User fetched.</reason><token>9cb7396dccabe68c067521db219afb83</token>

我已经阅读了很多 XML 解析实现，但我无法实现它，因为它不能满足我的需求，而且我无法理解其解释的复杂性。

如果有人能给我一个好的建议，我将不胜感激。

Answer 1

- (XMLParserViewController *) initXMLParser {


    appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

    return self;
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
  namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName
    attributes:(NSDictionary *)attributeDict 
{

    if([elementName isEqualToString:@"Books"]) {
        appDelegate.books = [[NSMutableArray alloc] init];
    }
    else if([elementName isEqualToString:@"Book"])
    {

        aBook = [[Books alloc] init];

    }

    NSLog(@"Processing Element: %@", elementName);
}

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

    if(!currentElementValue)
        currentElementValue = [[NSMutableString alloc] initWithString:string];
    else
        [currentElementValue appendString:string];

    NSLog(@"Processing Value: %@", currentElementValue);

}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
  namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {

    if([elementName isEqualToString:@"Books"])
        return;

    if([elementName isEqualToString:@"Book"])
    {
       [appDelegate.books addObject:aBook];        
          aBook = nil;
    }
    else if([elementName isEqualToString:@"name"])
    {
        aBook.name=currentElementValue;
    }
    else if([elementName isEqualToString:@"address"])
    {
        aBook.address=currentElementValue;
    }
    else if([elementName isEqualToString:@"country"])
    {
        aBook.country=currentElementValue;
    }        

    currentElementValue = nil;


    NSLog(@"%@",aBook.name);
    NSLog(@"%@",aBook.address);
    NSLog(@"%@",aBook.country);
}

试试这个，我希望这能奏效....