MFMailComposeViewController 拒绝关闭

Question

这让我抓狂。这段代码允许用户发送一封电子邮件，其中包含在应用程序中创建的图像。除了 self.dismiss(animated: true, completion: nil) - MFMailComposeViewController 不会关闭。

一切正常

我用这三个可能的问题作为解决问题的起点，但还是不行。尽管已发送邮件或已点击 cancel，但控制器仍然存在。

添加了协议实现MFMailComposeViewControllerDelegate。

func mailOpen(alertAction: UIAlertAction) {
    if MFMailComposeViewController.canSendMail() {
        let mailcontroller = MFMailComposeViewController()
        mailcontroller.mailComposeDelegate = self;
        mailcontroller.setSubject("Subject")
        let completeImage = newImage! as UIImage
        mailcontroller.addAttachmentData(UIImageJPEGRepresentation(completeImage, CGFloat(1.0))!, mimeType: "image/jpeg", fileName: "Image")
        mailcontroller.setMessageBody("<html><body><p>Message</p></body></html>", isHTML: true)

        self.present(mailcontroller, animated: true, completion: nil)
    } else {
        let sendMailErrorAlert = UIAlertView(title: "Could Not Send Email", message: "Your device could not send the e-mail. Please check e-mail configuration and try again.", delegate: self, cancelButtonTitle: "Got it!")
        sendMailErrorAlert.show()
    }

    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?) {
        self.dismiss(animated: true, completion: nil)
    }
}//end of mail

Answer 1

问题是您在 mailOpen 函数中编写了 didFinishWithResult: 委托方法，因此永远不会调用它，也不会执行关闭代码。

func mailOpen(alertAction: UIAlertAction)
{
    if MFMailComposeViewController.canSendMail()
    {
        let mailcontroller = MFMailComposeViewController()
        mailcontroller.mailComposeDelegate = self;
        mailcontroller.setSubject("Subject")
        let completeImage = newImage! as UIImage
        mailcontroller.addAttachmentData(UIImageJPEGRepresentation(completeImage, CGFloat(1.0))!, mimeType: "image/jpeg", fileName: "Image")
        mailcontroller.setMessageBody("<html><body><p>Message</p></body></html>", isHTML: true)

        self.present(mailcontroller, animated: true, completion: nil)

    }
    else
    {

        let sendMailErrorAlert = UIAlertView(title: "Could Not Send Email", message: "Your device could not send the e-mail. Please check e-mail configuration and try again.", delegate: self, cancelButtonTitle: "Got it!")
        sendMailErrorAlert.show()
    }
}//end of mail

func mailComposeController(_ controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?)
{
    self.dismiss(animated: true, completion: nil)
}

Answer 2

此处：

self.dismiss(animated: true, completion: nil)

您正在解雇自己的 ViewController，而不是 MFMailComposeViewController

应该是：

controller.dismiss(animated: true, completion: nil)

MFMailComposeViewController 拒绝关闭

MFMailComposeViewController refuse to dismiss

ios

mfmailcomposer

swift

mfmailcomposeviewcontroller