警告：试图提出<SLTwitterComposeViewController：0x233141c0>在<MainController：0x2083ebb0>谁的观点是不是在窗口层次

Question

我收到尝试使用下面的代码发布到Twitter的图像时这个错误，不能认为我是什么如何解决错误的想法？

- (void)PostToTwitter 

    { 
     UIImage* pxImage = [[self GetResultImage] retain]; 

     TWTweetComposeViewController *twitter = [[[TWTweetComposeViewController alloc] init] autorelease]; 

     [twitter setInitialText:@"Twitter Pic"]; 
     [twitter addImage:pxImage]; 

     FaceAppDelegate* app = (FaceAppDelegate*)[[UIApplication sharedApplication] delegate]; 
     [app.mainCtrl presentViewController:twitter animated:YES completion:NULL]; 

     twitter.completionHandler = ^(TWTweetComposeViewControllerResult res) 
     { 
      if(res == TWTweetComposeViewControllerResultDone) 
      { 
       UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Success" message:@"You have posted successfully." delegate:self cancelButtonTitle:@"Close" otherButtonTitles: nil]; 
       [alert show]; 
       [alert release]; 
      } 
      else if(res == TWTweetComposeViewControllerResultCancelled) 
      { 
       UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Cancelled" message:@"You have cancelled posting to Twitter." delegate:NULL cancelButtonTitle:@"Close" otherButtonTitles: nil]; 
       [alert show]; 
       [alert release]; 
      } 
      [app.mainCtrl dismissModalViewControllerAnimated:YES]; 
     }; 

     [pxImage release]; 

    } 

Answer 1

我认为，您的观点没有出现。尝试使用app.window.rootViewController，而不是属性mainContr。