我使用这些代码在iOS5模拟器中显示Twitter对话框-(void)showTwitter{TWTweetComposeViewController*tweet=[[TWTweetComposeViewControlleralloc]init];[tweetsetInitialText:self.textView.text];[tweetsetCompletionHandler:^(TWTweetComposeViewControllerResultresult){if(result==TWTweetComposeViewControllerResultDone){NSLog(@"O