IOS7 - SLComposeView控制器 - 错误发布到Twitter - 无法发布到Twitter - 连接错误

Question

当我试图发布到Twitter时，它会显示一条错误消息，上面写着＆＃34;无法发送推文，因为与Twitter的连接失败＆＃34;

 if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter])
{
    SLComposeViewController *composeViewController = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];

    if (composeViewController)
    {
        NSString *initialTextString = @"Test";

        [composeViewController setInitialText:initialTextString];

        [composeViewController setCompletionHandler:^(SLComposeViewControllerResult result)
        {
            if (result == SLComposeViewControllerResultDone)
            {
                NSLog(@"Posted");
                UIAlertView *alert1 = [[UIAlertView alloc]initWithTitle:@"" message:@"Posted on Twitter" delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];
                [alert1 show];
                [self performSelector:@selector(dismiss:) withObject:alert1 afterDelay:1.0];

            }
            else if (result == SLComposeViewControllerResultCancelled)
            {
                NSLog(@"Post Cancelled");

            }
            else
            {
                NSLog(@"Post Failed");

            }
        }];
        [self presentViewController:composeViewController animated:YES completion:nil];
    }
}