ios - 在 iOS swift 中实现完成时出错

Question

  let mailComposeViewController = self.configuredMailComposeViewController(randomNumber, email: email!)
   if MFMailComposeViewController.canSendMail()
   {
         self.presentViewController(mailComposeViewController, animated: true, completion { () -> Void in

              self.securityCode(randomNumber, email: email!)
         })
     }
     else
     {
          self.showSendMailErrorAlert()
     }

Answer 1

您错误地使用了补全。像这样使用它

self.presentViewController(mailComposeViewController, animated:true) { () -> Void in
             self.securityCode(randomNumber, email: email!)
        }