ios - 从父屏幕中删除 ViewController 保持黑色

Question

我在删除模态视图时遇到问题。 我想显示(按下按钮后)我自己的 SendMailViewController，它自己显示 MFMailComposeViewController。然后在按下取消发送后，在我自己的 SendMailView Controller 中的 didFinishWithResult 中，我做了一个 [self dismissModalViewControllerAnimated:YES] 并且有效。 MFMailComposeView 消失了。
但是随后屏幕保持黑色....它认为我还必须从它的父级中删除我的 SendMailViewController。这就是我按下按钮的地方......即使在 [self removeFromParentViewController] 之后它仍然保持黑色......

我哪里出错了？

是的，我想要额外的 View Controller (SendMailViewController)，因为该 Controller 将成为 MFMailComposeViewController 的委托(delegate)。否则我的调用者(带按钮的 Controller )将承担很大的责任。还是我这里也出错了？

谢谢，

/jr00n

- (IBAction)tapExportButton:(id)sender
{

    SendMailViewController *sendMailController = [[SendMailViewController alloc]init];

    [self presentViewController:sendMailController animated:YES completion:^()    {[sendMailController openMailDialog];}];

    [sendMailController release];

}

发送邮件 View Controller :

- (void)openMailDialog
{
    if ([MFMailComposeViewController canSendMail])
    {
        MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
        mailer.mailComposeDelegate = self;
     ...
        [self presentModalViewController:mailer animated:YES];
    }
}


- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
....
 // Remove the mail view
 // first i did this:
 // [self dismissModalViewControllerAnimated:YES];

    [self dismissViewControllerAnimated:YES completion:^{[self removeFromParentViewController];}];
}

Answer 1

问题出在 didFinishWithResult 方法中的 [self dismissViewControllerAnimated:YES completion:^{[self removeFromParentViewController];}];。
删除该行并添加以下行，

[controller dismissViewControllerAnimated:YES completion:^{[self dismissViewControllerAnimated:YES completion:nil]}];

确保我们在关闭 MailController 之后关闭 Controller