NSURLConnection NSMutableURLRequest和HTTPS

我有以下代码将图像上传到网站

[request setURL:nsurl];
[request setHTTPMethod:@"POST"];  

NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];  
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];  
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];  

/* 
 now lets create the body of the post 
 */  
NSMutableData *body = [NSMutableData data];  

//parameter1  
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];   
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"guid\"\r\n\r\n%@", [Settings sharedInstance].uploadID] dataUsingEncoding:NSUTF8StringEncoding]];  
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];  
//Image  
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"filMyFile\"; filename=\"%@\"\r\n", fileName] dataUsingEncoding:NSUTF8StringEncoding]];  
[body appendData:[[NSString stringWithString:@"Content-Type: image/png\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];  
[body appendData:[NSData dataWithData:dataObj]];  
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];  

// setting the body of the post to the reqeust  
[request setHTTPBody:body];  

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

在HTTP上运行时一切正常，但当我切换到HTTPS时，它会失败

错误：错误域=NSURErrorDomain代码=-1005“网络连接丢失。”用户信息=0x1c7f70{NSERRORFAILLINGURLSTRINGKEY=https:

它正在与之通信的服务器是MS server 2008 R2

任何想法都将不胜感激

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尼尔。

请参阅使用NSURLConnection进行https连接

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此外，服务器正在使用ASP.Net 4运行IIS。