title: Braintree iOS SDK saying no known class method
body: <p>I m getting this error. Anyone?</p>
  
  <pre><code>-(void)clientToken{
  
  NSURL *clientTokenURL = [NSURL URLWithString:@"http://tectutiveclients.com/projects/carboss/api/getToken"];
  
   NSMutableURLRequest *clientTokenRequest = [NSMutableURLRequest requestWithURL:clientTokenURL];
  
  [clientTokenRequest setValue:@"text/plain" forHTTPHeaderField:@"Accept"];
  
   [NSURLConnection
   sendAsynchronousRequest:clientTokenRequest
   queue:[NSOperationQueue mainQueue]
   completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
       // TODO: Handle errors in [(NSHTTPURLResponse *)response statusCode] and connectionError
     clientToken = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
  
       // Initialize `Braintree` once per checkout session
  
  
         [Braintree setupWithClientToken:clientToken
         completion:^(Braintree *braintree, NSError *error) {
             UIViewController *dropin = [braintree dropInViewControllerWithDelegate:self];
             [self presentViewController:[[UINavigationController alloc] initWithRootViewController:dropin]
                                animated:YES
                              completion:nil];
  
         // No known class method for selector setupwithClientToken Error
  
         }];
  
  
       UIViewController *dropin = [self.braintree dropInViewControllerWithDelegate:self];
       [self presentViewController:[[UINavigationController alloc] initWithRootViewController:dropin]
                          animated:YES
                        completion:nil];
       }];
  }
  </code></pre>