解析器错误 Error Domain=NSXMLParserErrorDomain Code=4 “操作无法完成。”

Question

我正在调用如下网络服务：

-(void)verifyEmailAndPasswordWebservices
{    
 NSString  *MD5Password = [ self MD5];
 NSLog(@"text field password %@",txt_Password.text);
 NSLog(@"converted password %@",MD5Password);    

NSString *soapMsg =[NSString stringWithFormat:
                    @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
                    "<SOAP-ENV:Envelope SOAP-ENV:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\"xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:SOAP-ENC=\"http://schemas.xmlsoap.org/soap/encoding/\" xmlns:tns=\"http://php:8393/includes/webservice\">"
                    "<SOAP-ENV:Body>"
                    "<ns1:LoginUserRequest xmlns:ns1=\"http://schemas.xmlsoap.org/soap/envelope/\">"                        
                    "<email xsi:type=\"xsd:string\">%@</email>"
                    "<pass xsi:type=\"xsd:string\">%@</pass>"                   
                    "</ns1:LoginUserRequest>"
                    "</SOAP-ENV:Body>"
                    "</SOAP-ENV:Envelope>",txt_EmailOrMobile.text,MD5Password];



//---print it to the Debugger Console for verification---
NSLog(@"soapMsg..........%@",soapMsg);

NSURL *url = [NSURL URLWithString:@"http://10.0.0.115:8393/includes/webservice/login1.php"];
req = [NSMutableURLRequest requestWithURL:url];

//---set the headers---

NSString *msgLength = [NSString stringWithFormat:@"%d",[soapMsg length]];
[req addValue:@"application/soap+xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
[req addValue:@"http://10.0.0.115/includes/webservice/login1.php/LoginUser" forHTTPHeaderField:@"SoapAction"];
[req addValue:msgLength forHTTPHeaderField:@"Content-Length"];

//---set the HTTP method and body---

[req setHTTPMethod:@"POST"];
[req setHTTPBody: [soapMsg dataUsingEncoding:NSUTF8StringEncoding]];

// [activityIndicator startAnimating];

conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];
if (conn)
{
    webData = [[NSMutableData data] retain];
}   
}

当我收到回复时，它给了我以下错误：

完成。接收字节数：422 显示 XML (null) 解析器错误 Error Domain=NSXMLParserErrorDomain Code=4 "操作无法完成。(NSXMLParserErrorDomain error 4.)"

我在互联网上搜索了很多。但无法找到任何东西。请对此有任何帮助。

Answer 1

在您的编码方法上尝试此代码

NSString *theXML = [[NSString alloc] initWithBytes: [_responseData mutableBytes] length:[_responseData length] encoding:NSUTF8StringEncoding];

Answer 2

另一个可能的原因可能是没有根标签。 例子：一个这样的xml数据--->

---

2011-12-22

<days_remaining>
            0
</days_remaining>

Answer 3

NSXMLParserErrorDomain error 4 表示给 XML 解析器一个空文档。这向我表明，输入要么为空，要么您已设法在将其提供给解析器之前对其进行了更改。

我更好地查看了您的代码。问题不在于你没有得到回应。只是你没有等待它。您发送的请求是异步的，但您正试图立即（即同步）填充您的 webData 变量。