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我创建了一个使用以下内容的应用程序：

SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter

代码似乎可以正常工作，并将帖子发布到 Facebook 和 Twitter，但是一旦帖子完成，我返回应用程序视图，没有任何控件处于活动状态，我必须关闭应用程序并重新启动它们才能再次工作.

我想我在 IF 语句（下面发布）中嵌套了错误的代码，所以想知道是否有人可以提供任何建议。

我对 Xcode 等非常陌生，所以请耐心等待我 :-)

提前致谢

皮特

- (IBAction)postButton:(id)sender

{ if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])

{
    SLComposeViewController *facebook = [[SLComposeViewController alloc] init];

    ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]);

    {
        SLComposeViewController *twitter = [[SLComposeViewController alloc] init];

        facebook = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
        [facebook setInitialText:[[self statusMessage]text]];

        twitter = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
        [twitter setInitialText:[[self statusMessage]text]];

        [self presentViewController:facebook animated:YES completion:nil];

        [facebook setCompletionHandler:^(SLComposeViewControllerResult result)

        {
            NSString *output;
            switch (result)
            {
                case SLComposeViewControllerResultCancelled:
                    output = @"Action Cancelled";
                    break;
                case SLComposeViewControllerResultDone:
                    output = @"Post Sucessfull";
                default:
                    break;
            }

            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Facebook" message:output delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            [alert show];

            [self presentViewController:twitter animated:YES completion:nil];

            [twitter setCompletionHandler:^(SLComposeViewControllerResult result)

            {
                NSString *output;
                switch (result)

                {
                    case SLComposeViewControllerResultCancelled:
                        output = @"Action Cancelled";
                        break;
                    case SLComposeViewControllerResultDone:
                        output = @"Tweet Sucessfull";
                    default:
                        break;
                }

                UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Twitter" message:output delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                [alert show];

            }];
        }

         ];}
}

}

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