Warning: Attempt to present ViewController on ViewController whose view is not in the window hierarchy

Question

I have already looked through related questions but nothing has solved my problem.

I am attempting to use dismissViewControllerAnimated:animated:completion

Answer 1

About this,

- (IBAction)emailMe:(id)sender {
    [self dismissViewControllerAnimated:YES completion:^{
        [self sendMeMail];
    }];
}

After dismissing self viewController, you cannot present view controllers from self.

Then what you can do ?

1) Change the button press method,

- (IBAction)emailMe:(id)sender {
    [self sendMeMail];
}

2) You can dismiss the self viewController, when the mailViewController is dismissed.

- (void)mailComposeController:(MFMailComposeViewController*)controller
          didFinishWithResult:(MFMailComposeResult)result
                        error:(NSError*)error;
{
    if (result == MFMailComposeResultSent) {
        NSLog(@"It's sent!");
    }
    [controller dismissViewControllerAnimated:NO completion:^ {
        [self dismissViewControllerAnimated:YES completion:nil];
    }];

}