iOS请求webservice接口需要明确知道什么信息

[混昏黄]

公司只给了一个wsdl接口能够请求出数据吗
NSString *soapMsg = [NSString stringWithFormat:
@"<?xml version='1.0' encoding='GB2312' standalone='yes' ?>"
@"<soap:Envelope "
"xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" "
"xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" "
"xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\">"
"<soap:Body>"
"< 方法名怎么在wsdl接口里面找到 xmlns=\"命名空间怎么找到">"


"</方法名>"
"</soap:Body>"
"</soap:Envelope>"];
NSURL *url = [NSURL URLWithString: @"http://x.x.x.x：x/soap/Service?wsdl"];
// 根据上面的URL创建一个请求
NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];
NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMsg length]];
// 添加请求的详细信息，与请求报文前半部分的各字段对应
[req addValue:@"application/soap+xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];

[req addValue:msgLength forHTTPHeaderField:@"Content-Length"];
// 设置请求行方法为POST，与请求报文第一行对应
[req setHTTPMethod:@"POST"];
// 将SOAP消息加到请求中

[req setHTTPBody: [soapMsg dataUsingEncoding:NSUTF8StringEncoding]];
// 创建连接
conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];
if (conn) {
webData = [NSMutableData data];
}

[偶说撒浪嘿]

楼主问题解决了么，我也是这样写的，但是返回的是bad request