Question

我有一个过时的应用程序，用于下载XML文档并在iPhone应用程序上解析它，我为此目的使用了NSURLConnection：

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    //NSLog(@"Response :%@",response);
    responseData = [[NSMutableString alloc] init];
}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSString *str = [[NSString alloc] initWithData:data 
                                          encoding:NSASCIIStringEncoding];

    [responseData appendString:str];
    [str release];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{

    NSLog(@"DATA : %@",responseData);   

    if (responseData != nil) {

        [self startParsing:responseData];//Parse the data
        [responseData release];
    }   
}

自从NSXMLParserDelegate移至AFXMLRequestOperation后，我无法找到正确获取xml数据的方法：

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

    [responseData appendString:elementName];
    [responseData appendString:namespaceURI];
    [responseData appendString:qName];

}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
    [responseData appendString:string];

}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
    [responseData appendString:elementName];
    [responseData appendString:namespaceURI];
    [responseData appendString:qName];


}
-(void) parserDidEndDocument:(NSXMLParser *)parser{
    [SVProgressHUD showSuccessWithStatus:@"Downloading completed"];

        NSLog(@"DATA : %@",responseData);//not properly appended, tags delimeters are missing 

        if (responseData != nil) {

            [self startParsing:responseData];
            [responseData release];
        }


}

如何在responseData可变字符串中附加从服务器收到的所有数据？我在完成下载后调试了收到的数据，并且xml缺少标记delimeters <>。我想我错过了获取xml数据的方法。

P.S：请注意我在NSMutableString对象中获取xml很重要。

@Fermi

我按照你的建议使用了AFURLConnectionOperation，它可以正常工作，但我注意到我的接收数据没有被委托方法捕获，而是我可以在完成块中获取数据：

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:API_URL]];

AFURLConnectionOperation *operation = [[AFURLConnectionOperation alloc] initWithRequest:request];
operation.completionBlock = ^{
    NSLog(@"Complete: %@",operation.responseString);//responseString is my data


};
[operation start];
[SVProgressHUD showWithStatus:@"Downloading files"];

由于没有调用NSURLConnection委托方法，我如何管理失败等？感谢名单。

Answer 1

AFXMLRequestOperation明确用于返回NSXMLDocument实例，而不是原始XML字符串。

如果您希望XML字符串使用AFURLConnectionOperation并使用与NSMutableString相同的方式构建NSURLConnection。

获取整个XML下载的数据

1 个答案: