Проблема с получением описания ошибки после SSL_CTX_new возвратила ПУСТОЙ УКАЗАТЕЛЬ

создайте метод для извлечения данных. Передайте ваш URL в строке urlwithstring.

-(void)fetchjsondata
{
     NSString *login= [[NSString stringWithFormat:@"your url string"]stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSLog(@"----%@", login);
    NSURL *url = [NSURL URLWithString:[login stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    //-- Get request and response though URL
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:url];


    [NSURLConnection sendAsynchronousRequest:request
                                       queue:[NSOperationQueue mainQueue]
                           completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
                               dispatch_async(dispatch_get_main_queue(), ^{
                                   if (data) {
                                       dic_property= [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
                                       NSLog(@"%@", dic_property);
                                       NSLog(@"counts=%d",[[dic_property objectForKey:@"Data"]count]);



                                   }
                                   else {
                                       NSLog(@"network error, %@", [error localizedFailureReason]);
                                   }
                               });

                           }];

}

вызовите fetchjsonmethod в любом месте.

[NSThread detachNewThreadSelector: @selector (fetchdata) toTarget: self withObject: nil];