I want to ignore certificate verification, where and how to do it with XMLRPC web service?

Question

I am accessing a web service and getting this error when trying to connect( web service is XMLRPC and I am using wordpress xmlrpc source code for request and handling repsonse):

Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “**.org” which could put your confidential information at risk."

WebService people are saying to ignore certificate verification part, so if someone has idea of how to do that will be of great help for me.

after some suggestion I used the below NSURLConnection delegate, stil same error

 -(BOOL)connection:(NSURLConnection *)connection  canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {  
 return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
 }   

 -(void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {  
 if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust])  
if ([trustedHosts containsObject:challenge.protectionSpace.host])  
  [challenge.sender useCredential:[NSURLCredential  credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];  
  [challenge.sender continueWithoutCredentialForAuthenticationChallenge:challenge];
}

Answer 1

As of now Jay has given the right answer. But these two methods are deprecated now.

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace // deprecated over iOS 5.0. Not even called in iOS 7.0

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge // deprecated over iOS 5.0. Not even called in iOS 7.0

So instead of that you can use that method:

-(void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
    if ([[challenge protectionSpace] authenticationMethod] == NSURLAuthenticationMethodServerTrust) {
        [[challenge sender] useCredential:[NSURLCredential credentialForTrust:[[challenge protectionSpace] serverTrust]] forAuthenticationChallenge:challenge];
    }
}

I have used this chunk of code to overcome the below listed error:

Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “app.*****.com” which could put your confidential information at risk.