how to check whether user entered his facebook details in iphone setting before composing SLComposeViewController in ios 6

Question

i want to show a alert message before composing SLComposeViewController in my App , how to check whether user entered his facebook details in iphone setting before composing SLComposeViewController in ios 6 .

Answer 1

i have figured this out . . . 

self.myStore = [[ACAccountStore alloc] init];
    ACAccountType *acct = [self.myStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];
    NSArray *fbAccounts = [self.myStore accountsWithAccountType:acct];

    // Check to make sure the user has a FB account setup, or bail:
    if ([fbAccounts count] == 0) {
        userDoesNotHaveFBAccountSetup = YES;
        self.fbSwitch.enabled = NO;
        [[self fbSwitch] setOn:NO];
        [self viewDidLoad];
    } else {
        userDoesNotHaveFBAccountSetup = NO;
        self.fbSwitch.enabled = YES;
    }