How to determine when a user removes an application from Facebook

Question

I am new to using the SDK for Facebook, and I was thinking how to determine when a user removes the application from their Facebook account. Currently, if we delete the application, and we want to publish something from our application, I get an error.

Answer 1

Try the following:

[FBSession renewSystemCredentials:^(ACAccountCredentialRenewResult result, NSError *error) {
    if (!error) {
        if (result == ACAccountCredentialRenewResultRejected) {
            NSLog(@"Facebook app deleted");
        }
    }
    else {
        NSLog(@"Error: %@", error);
    }
}];

Answer 2

http://developers.facebook.com/docs/authentication/#app-deauthorization

• https://developers.facebook.com/apps/
• go to the application editing screen.
• click on advanced in the left column.
• " "

, , URL- . HTTP POST, , signed_request, (UID) , . .