ios - 电子邮件已发送完毕，但发送电子邮件窗口未关闭？

Question

这个问题已经有答案了:

Swift 3 How to display a confirmation screen based on MFMailComposeResult email screen (2 个回答)

已关闭 6 年前。

我的问题是我编写了 emailwindow 并且它确实发送电子邮件，但是当它们发送或我想关闭窗口时，什么也没有发生。

这是我的代码:

import Foundation
import UIKit
import MessageUI


class ContactViewController: UIViewController, MFMailComposeViewControllerDelegate, UIAlertViewDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

let mail = MFMailComposeViewController()


    @IBAction func email(_ sender: Any) {

        if !MFMailComposeViewController.canSendMail() {
            let warnung = UIAlertController(title: "Email konnte nicht gesendet werden", message: "Dein Gerät unterstützt leider keine Email-Funktion.", preferredStyle: .alert)
            let action1 = UIAlertAction(title: "OK", style: .default, handler: nil)
            warnung.addAction(action1)
            self.present(warnung, animated: true, completion: nil)
            return

            } else {

                mail.mailComposeDelegate = self
                mail.setToRecipients(["team@example.com"])
                mail.setSubject("Message to you")
                mail.setMessageBody("Hello,\n", isHTML: false)

                present(mail, animated: true, completion: nil)

            func mailComposeController(_ controller: MFMailComposeViewController,
                                       didFinishWithResult result: MFMailComposeResult, error: NSError?) {
                mail.dismiss(animated: true, completion: nil)
                print("Yes!")
                }


            }
        }
}

这是邮件窗口的屏幕截图: Just click on this link!

Answer 1

@IBAction func email(_ sender: Any) {

    if !MFMailComposeViewController.canSendMail() {
        let warnung = UIAlertController(title: "Email konnte nicht gesendet werden", message: "Dein Gerät unterstützt leider keine Email-Funktion.", preferredStyle: .alert)
        let action1 = UIAlertAction(title: "OK", style: .default, handler: nil)
        warnung.addAction(action1)
        self.present(warnung, animated: true, completion: nil)
        return

        } else {

            mail.mailComposeDelegate = self
            mail.setToRecipients(["team@example.com"])
            mail.setSubject("Message to you")
            mail.setMessageBody("Hello,\n", isHTML: false)

            present(mail, animated: true, completion: nil)
        }
    }
}

func mailComposeController(_ controller: MFMailComposeViewController,
                                   didFinishWithResult result: MFMailComposeResult, error: NSError?) {
            mail.dismiss(animated: true, completion: nil)
            print("Yes!")
}