ios7 - ios: Application tried to present a nil modal view controller on target

Question

I am developing an application,the requirement is to open email composer on a button click of UIAlertView.

message which is in message body of email is copied from UITextView. i am using following code snipt:

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 0)
  {
      // opening message composer
  }
else
  {
   MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;
    [picker setSubject:@"Test mail"];
    [picker setMessageBody:messageBody.text isHTML:YES];
    [self presentViewController:picker animated:YES completion:NULL];
  }
}
 // mail compose delegate
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
      [self dismissViewControllerAnimated:YES completion:NULL];
}

but the issue is that i am getting error saying Application tried to present a nil modal view controller on target. how we can open default mail composer in ios 7?

Answer 1

As per Apple, You should check is MFMailComposeViewController are able to send your mail just before sending

if ([MFMailComposeViewController canSendMail]) {
     MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;
    [picker setSubject:@"Test mail"];
    [picker setMessageBody:messageBody.text isHTML:YES];
    [self presentViewController:picker animated:YES completion:NULL];
}

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Swift:

if MFMailComposeViewController.canSendMail() else {
// Send mail code
}

Ref : Apple Dev url

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