我创建了一个使用以下内容的应用：
SLComposeViewController isAvailableForServiceType：SLServiceTypeFacebook SLComposeViewController isAvailableForServiceType：SLServiceTypeTwitter
代码似乎工作正常并将帖子发布到Facebook和Twitter但是一旦帖子完成后我又回到应用程序视图，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再次工作。
我认为我在IF语句中错误地嵌入了代码（在下面发布），所以想知道是否有人可以提供任何建议。
我对Xcode等很陌生，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];
}];
}
];}
}
}