ios - 访问 Twitter 帐户

Question

我正在使用以下代码在 iOS 6 中使用 SLRequest 和 ACAccounts 发布到 Twitter。问题是当有多个帐户时，我无法控制授予哪个帐户访问权限。让用户选择他们想要发布的帐户的建议？

-(void)twitteraccess {
    ACAccountStore *account = [[ACAccountStore alloc] init];
    ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:
                                  ACAccountTypeIdentifierTwitter];

    [account requestAccessToAccountsWithType:accountType options:nil
                                  completion:^(BOOL granted, NSError *error)
     {
         if (granted == YES)
         {
             NSArray *arrayOfAccounts = [account
                                         accountsWithAccountType:accountType];

             if ([arrayOfAccounts count] > 0)
             {
                 ACAccount *twitterAccount = [arrayOfAccounts lastObject];

                 NSDictionary *message = @{@"status": @"Message"};

                 NSURL *requestURL = [NSURL
                                      URLWithString:@"http://api.twitter.com/1/statuses/update.json"];

                 SLRequest *postRequest = [SLRequest
                                           requestForServiceType:SLServiceTypeTwitter
                                           requestMethod:SLRequestMethodPOST
                                           URL:requestURL parameters:message];

                 postRequest.account = twitterAccount;

                 [postRequest performRequestWithHandler:^(NSData *responseData,
                                                          NSHTTPURLResponse *urlResponse, NSError *error)
                  {
                      NSLog(@"Twitter HTTP response: %i", [urlResponse
                                                           statusCode]);
                  }];
             }
         }
         else {
             if(error.code == 6){
                 [self performSelectorOnMainThread:@selector(alertmessagetwitter)
                                        withObject:nil
                                     waitUntilDone:YES];                }
         }
     }];
}