UIActivityViewController dismiss MailViewController - objective-c

Question

I've try to send an email over the UIActivityViewController and it works fine, but the mail view is not dismissed after the email was send. It also wont't dismiss when the user has pushed the Cancel button.
What can I do to fix the problem?
Here the code I have used:
//conf share view
NSString *textToShare = #"Teststring!";
UIImage *imageToShare = fetchedImage;
NSURL *urlToShare = [NSURL URLWithString:string_url];
NSArray *activityItems = [[NSArray alloc] initWithObjects:textToShare, imageToShare,urlToShare,nil];
UIActivity *activity = [[UIActivity alloc] init];
NSArray *applicationActivities = [[NSArray alloc] initWithObjects:activity, nil];
UIActivityViewController *activityVC =
[[UIActivityViewController alloc] initWithActivityItems:activityItems
applicationActivities:applicationActivities];
activityVC.excludedActivityTypes = #[UIActivityTypeAssignToContact,
UIActivityTypePostToWeibo,
UIActivityTypeCopyToPasteboard,
UIActivityTypeSaveToCameraRoll,
UIActivityTypePrint];
[activityVC setCompletionHandler:^(NSString *activityType, BOOL completed) {
NSLog(#"CompletionHandler was called!");
}];
Thanks!

Answer 1

I have the solution. You want to present the UIActivityViewController in your fundamental, i.e. your highest or last view controller. In my case, this worked:
[[[self parentViewController] parentViewController] presentViewController:activityViewController animated:YES completion:nil];
Try out yourself how many times you have to call parentViewController until you are accessing the highest view controller. In my simple MasterView/DetailView app, I had to call it twice.

Answer 2

it always come in this completion handler after the posting is done weather it was successfull or not
[activityViewController setCompletionHandler:^(NSString *activityType, BOOL completed)
{
if (completed)
{
UIAlertView *objalert = [[UIAlertView alloc]initWithTitle:#"Alert" message:#"Posting was successful" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[objalert show];
objalert = nil;
}else
{
UIAlertView *objalert = [[UIAlertView alloc]initWithTitle:#"Alert" message:#"Posting was not successful" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[objalert show];
objalert = nil;
}
}];

Answer 3

then try to dismiss it on the completitionHandler
[activityVC setCompletionHandler:^(NSString *activityType, BOOL completed) {
//Dismiss here
}];