电子邮件已完成但发送电子邮件窗口未关闭？ [复制]

Posted 2023-02-23

【中文标题】电子邮件已完成但发送电子邮件窗口未关闭？ [复制]

【英文标题】：Email finished but the send email window does not close? [duplicate]

【发布时间】：2017-05-09 13:23:54

【问题描述】：

我的问题是我对 emailwindow 进行了编程，它确实会发送电子邮件，但是当它们被发送或我想关闭窗口时，什么都没有发生。

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(["[e-mail]"])
                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!

【问题讨论】：

为什么委托方法在email(_sender:)方法内部，在else测试中？

因为我认为当它在 else 方法中时效果更好

请注意，您的方法 didFinishWithResult 已在您的 IBAction 电子邮件方法中声明。您需要将该方法移出该 IBAction 方法。它必须是您的视图控制器的实例方法

【参考方案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(["[e-mail]"])
            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!")