You can do this:
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager.securityPolicy setValidatesDomainName:NO];
[manager.securityPolicy setAllowInvalidCertificates:YES];
NSURLSessionDataTask *dataTask = [manager dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
}];
[dataTask resume];
UPDATE:
If you wish to validate your certificate you can do this instead:
Add your certificate to your app's bundle.
Then do this:
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeCertificate];
[manager.securityPolicy setValidatesDomainName:NO];
[manager.securityPolicy setAllowInvalidCertificates:YES];
NSURLSessionDataTask *dataTask = [manager dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
}];
[dataTask resume];