How to detect when user delete the app from Facebook

Question

I\'m new to using the Facebook SDK and I wondered how detect when the user deletes the app from his Facebook account. Currently if we delete the app, and we want to post som

Answer 1

Try this:

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