Question

Once a user has tweeted something, I need to differentiate which twitter account he used. Lets consider that the user would have 1 or several accounts configured on the phone.

I need tho know this after the tweet is successful, so the proper place would be the callback. I tried to fetch the accounts using ACAccountStore but it provides an array with all the accounts set up on the phone, not a clue about the last account used (not even the order of the array).

Does anyone knows if TWTweetComposeViewController remembers this account and, how to fetch it?

Thanks

My code:

if ([TWTweetComposeViewController canSendTweet])
{
    TWTweetComposeViewController *tweetSheet = 
    [[TWTweetComposeViewController alloc] init];
    [tweetSheet setInitialText:@"initial text"];
    [tweetSheet addImage:[UIImage imageNamed:image]];

    // Callback
    tweetSheet.completionHandler = ^(TWTweetComposeViewControllerResult result) {
        // if tweet was successful
        if(result == TWTweetComposeViewControllerResultDone) {

            // Get the accounts
            account = [[ACAccountStore alloc] init];
            ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];

            [account requestAccessToAccountsWithType:accountType withCompletionHandler:^(BOOL granted, NSError *error) 
             {
                 // if access granted I populate the array
                 if (granted == YES) {
                     NSArray *arrayOfAccounts = [account accountsWithAccountType:accountType];

                     ACAccount *account1 = [arrayOfAccounts objectAtIndex:0];
                     ACAccount *account2 = [arrayOfAccounts objectAtIndex:1];

                     NSString *username1 = account1.username;
                     NSString *username2 = account2.username;

                     // Always same order
                     NSLog(userName1);
                     NSLog(userName2);

                 }
             }];

            [self furtherMethodsInCaseOfSuccessfulTweet];


        } else if(result == TWTweetComposeViewControllerResultCancelled) {
            NSLog(@"twit canceled");
        }
        [self dismissViewControllerAnimated:YES completion:nil];
    };


    [self presentModalViewController:tweetSheet animated:YES];

}
else
{
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"No tweet is possible on this device" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [alertView show];

}   

}

Answer 1

I found a way.

Instead looking for the username on the insctance of TWTweetComposeViewController , lets use GET users/lookup to qwery the names gathered by ACAccountStore.

http://api.twitter.com/1/users/lookup.xml?screen_name=username1,username2
(use json instead xml)

Parsing the results we can get the date/time of the last tweet of the users (“status” tag), and voila, we have the last account used.
In additiom, you can test the qwery results on the console.

Thanks to @theSeanCook