wsdl / soap无法加载外部实体

Question

我在iOS应用中使用ASIHTTPRequest。我正在调用像这样的wsdl / Soap Web服务：

NSData *xmlData =  // I construct the soap message witk soapui

NSURL *url = [NSURL URLWithString:@"https:myUrlWSDL"];
self.currentRequest = [ASIFormDataRequest requestWithURL:url];
[self.currentRequest appendPostData:xmlData];
[self.currentRequest setDelegate:self];
[self.currentRequest startAsynchronous];

但服务器返回给我这个错误：

<?xml version="1.0" encoding="UTF-8"?> <SOAP-ENV:Envelope xmlns:SOAP-ENV="schemas.xmlsoap.org/soap/envelope/…: Parsing WSDL: Couldn't load from 'http://...?wsdl' : failed to load external entity "http://...?wsdl"

这是一个问题ssl ??谢谢你的回答