斯威夫特的Xcode錯誤：「不能分配型‘SendEmailToVerifyPassword’的值鍵入「MFMailComposeViewControllerDelegate？

Question

我的項目的目的是爲了有一個登錄/創建賬戶屏幕，用戶點擊一個按鈕，可以發送給他們用自己的用戶名&密碼的電子郵件，以驗證它

注：用戶名，密碼和電子郵件在不同的班級我的項目 編輯聲明全局變量：有人說的東西添加到文件的到底是什麼，甚至意味着一個人可以幫

截圖錯誤：？？ enter image description here

SendEmailToVerifyPassword類：

import UIKit 
import MessageUI 
class SendEmailToVerifyPassword: MFMailComposeViewController 
{ 
    func ViewDidLoad() 
    { 
     super.viewDidLoad() 
    } 
    func configuredMailComposeViewController() -> MFMailComposeViewController { 
     let mailComposerVC = MFMailComposeViewController() 
     mailComposerVC.mailComposeDelegate = self // Extremely important to set the --mailComposeDelegate-- property, NOT the --delegate-- property 

     mailComposerVC.setToRecipients([email]) 
     mailComposerVC.setSubject("Your password/username verification") 
     mailComposerVC.setMessageBody("Hello.\n Your username is: \(username)\n Your password is \(password)", isHTML: false) 

     return mailComposerVC 
    } 

    func showSendMailErrorAlert() { 
     let sendMailErrorAlert = UIAlertView(title: "Could Not Send Email", message: "Your device could not send e-mail. Please check e-mail configuration and try again.", delegate: self, cancelButtonTitle: "OK") 
     sendMailErrorAlert.show() 
    } 

    func mailComposeController(controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?) { 

     switch result.rawValue { 

     case MFMailComposeResultCancelled.rawValue: 
      print("Cancelled mail") 
     case MFMailComposeResultSent.rawValue: 
      print("Mail Sent") 
     default: 
      break 
     } 
     self.dismissViewControllerAnimated(true, completion: nil) 
    } 



} 

截圖故事板按鈕視圖 - 控制（點擊這裏是按鈕，我想啓動電子郵件）： enter image description here

Answer 1

class SendEmailToVerifyPassword: MFMailComposeViewController, MFMailComposeViewControllerDelegate 
{ 
... 
}