iOS6 : MFMailComposeViewController is not displaying

Question

MFMailComposeViewController 未在 ios6 中显示，而在 ios6 中运行相同的代码 我的代码是

   if ([MFMailComposeViewController canSendMail])
   {
       searchView.hidden=YES;
       MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
       picker.mailComposeDelegate = self;
       [picker setSubject:[NSString stringWithFormat:@"Query from ccc App"]];
       NSArray *toarr =[[NSArray alloc]initWithObjects:@"ccc-connections@ccc.edu", nil];
       [picker setToRecipients:toarr];
       [self presentModalViewController:picker animated:YES];          
   }

Answer 1

presentModalViewController:animated: 在 iOS 6.0 中已弃用。

改用 presentViewController:animated:completion:。