FBConnect using other ViewController

in the YourApp_AppDelegate.h

#import "FBConnect.h"
Facebook *facebook;
@property (nonatomic, retain) Facebook *facebook;

In the YourApp_AppDelegate.m

@synthesize facebook;

Then in your application didFinishLaunchingWithOptions: function:

facebook = [[Facebook alloc] initWithAppId:@"YOUR_FACEBOOK_API"];

From your viewController.h (any of them),

#import "YourApp_AppDelegate.h"
YourApp_AppDelegate *appDelegate;

And then, in your viewController.m viewDidLoad function:

appDelegate = (YourApp_AppDelegate *)[[UIApplication sharedApplication] delegate];

Now, anytime you want to refer to your Facebook singleton, just refer to it like:

[appDelegate.facebook authorize:nil delegate:self];