CODEWITHSUNDEEP
iosswiftmfmailcomposeviewcontroller
batgun
batgun

Reputation: 1029

Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior

I am trying to implement a send mail code but I'm getting the following error : 

Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior

Here is my code piece:

    if MFMailComposeViewController.canSendMail() {
        let mail = MFMailComposeViewController()
        mail.mailComposeDelegate = self
        mail.setToRecipients(["@gmail.com"])            
        presentViewController(mail, animated: true, completion: nil)
    } else {
        // show failure alert
    }

Upvotes: 2

Views: 3507

Answers (2)

Mike Taverne
Mike Taverne

Reputation: 9352

I think your "mail" object is going out of scope and getting deallocated before it is presented.

Try making "mail" a class-level var at the top of your view controller:

    var mail: MFMailComposeViewController?

Then set and use it in your button action:

    self.mail = MFMailComposeViewController()
    mail!.mailComposeDelegate = self
    //etc....

EDIT: The mail object is retained by the presentViewController function, so my answer is incorrect. Thanks to Daniel Zhang for pointing this out.

Upvotes: 1

Daniel Zhang
Daniel Zhang

Reputation: 5858

The error that you received could happen if you forgot to remove the segue to another function of your button.

Upvotes: 2

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