Method returning value from asynchronous block with FacebookSDK

Question

What I am trying to do is a Facebook wrapper for the Facebook iOS SDK. Basically the idea is that my ViewController should do nothing but showing ex. my friends that will be

Answer 1

If you are dispatching an asynchronouos block, you can communicate with your UIViewController subclass by calling back to it:

[self someSelectorWithCallbackData:stuffWhichYouWantToGiveBack];

This will call self to get captured by the block, and so will work as expected. From the relevant method you can refresh the view / reload the tableview / dance a jig as required.

Depending on the context, you may need to __block scope self, eg

__block UIViewController *bsself = self;

But if you do the latter, be careful to avoid a retain loop (the build and analysis tools are fairly good at pointing this out).