How to call a method within fbDialogNotLogin?

I'm using Facebook SDK in my app, but need help with what happens when the login process is cancelled. I tried referencing another controller, but it crashes and I get an error of Instance variable 'textview_facebook' accessed in a class method.

It looks like I cannot make graphical changes inside this kind of method... how can I get around this?

Any advice? Thanks in advance!

Facebook.m

- (void)fbDialogNotLogin:(BOOL)cancelled {
  if ([self.sessionDelegate respondsToSelector:@selector(fbDidNotLogin:)]) {
    [_sessionDelegate fbDidNotLogin:cancelled];
      NS开发者_运维技巧Log(@"Facebook Cancelled!!!");
      [MapViewController stuffIsCancelled];
  }
}

MapViewController.m

  +(void)stuffIsCancelled {
        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.4];

        textview_facebook.alpha = 0;

        [UIView commitAnimations];
        }

Because you are in a class method you cannot access the instance properties, you only have access to static variables.

Depending on your project structure you can:

• Set the session delegate to be the MapViewController assuming that you call the login from it, implement the fbDidNotLogin method and move the animations stuff in it.
• Make the MapViewController a singleton and make the stuffIsCanceled an object method.
• Make the textview_facebook static