在很多的情况下，我们会常常遇到webservive写的接口，往往这种情况下，我们就需要拼接一段报文去与服务器对接

首先要明白webService的工作原理,,,(http://www.cnblogs.com/Jessy/p/3528341.html)

//假如在这开始请求

  NSString *webServiceBodyStr = [NSString stringWithFormat:

                  @"<Jsjy_yjy xmlns=\"http://xxxxx.com/webservice/\">"

                  "<name>wanger</name>"

                  "<pagenow>1</pagenow>"

                  "<pagesize>20</pagesize>"

                  "</Jsjy_yjy>"];//这里是参数

  NSString *webServiceStr = [NSString stringWithFormat:

                @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"

                "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\n"

                "<soap:Body>\n"

                "%@\n"

                "</soap:Body>\n"

                "</soap:Envelope>",

                webServiceBodyStr];//webService头

  NSString *SOAPActionStr = [NSString stringWithFormat:@"http://xxx.com/webservice/%@", @"Jsjy_yjy"];//SOAPAction

  NSURL *url = [NSURL URLWithString:@"http://xxxx/key/MurpjsjyService.asmx"];

  NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];

  NSString *msgLength = [NSString stringWithFormat:@"%ld", webServiceStr.length];

  [theRequest addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-type"];

  [theRequest addValue:SOAPActionStr forHTTPHeaderField:@"SOAPAction"];

  [theRequest addValue:msgLength forHTTPHeaderField:@"Content-Length"];

  [theRequest setHTTPMethod:@"POST"];

  [theRequest setHTTPBody:[webServiceStr dataUsingEncoding:NSUTF8StringEncoding]];

  NSURLConnection *theConn = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

  if (theConn) {

  }else {

  }