I did this in facebook

```
[self vSuspendAndHaltThisThreadTillUnsuspendedWhileDoing:^{
    [[NSOperationQueue mainQueue] addOperationWithBlock:^{
        [self.ACAstore requestAccessToAccountsWithType:self.ACAccounts options:[self dicPostOptions] completion:^(BOOL granted, NSError *error) {
            self.bPermissionToAccessStoreGranted=granted;
            [self vContinue];
        }];
    }];
}];

```

Basically I am asking for publish permission. What I want to do is to check whether such publish permission has been granted or not before asking again.

How to do so?