メールは終了しましたが、メールの送信ウィンドウは閉じませんか？

Question

私の問題は、emailwindowをプログラムして電子メールを送信することですが、送信した場合や、ウィンドウを閉じたい場合は何も起こりません。私のコードザッツ

：メールウィンドウの

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!") 
       } 


      } 
     } 
} 

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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!") 
}