Question

此代码可以正常工作，并显示所有已填写的电子邮件表格，并且可以很好地发送电子邮件，只是在发送或尝试取消后无法将其关闭。

我确定我缺少一些简单的东西。我还意识到，如果有错误，我什么都没有，但是现在可以正常工作并发送电子邮件，但是我无法关闭它

尝试了一些我在网上找到的建议，还有其他方法可以做到这一点，但是我试图理解为什么它不起作用，所以希望这种方法（或关闭方法）起作用。...xcode 10.2.1

import UIKit
import MessageUI

class ViewController: UIViewController, MFMailComposeViewControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    @IBAction func sendEmail(_ sender: Any) {

        sendEmail()

        }

    func sendEmail() {
        if MFMailComposeViewController.canSendMail() {
            let mail = MFMailComposeViewController()
            mail.mailComposeDelegate = self
            mail.setToRecipients(["xxx@xx.com"])
            mail.setSubject("test  ")
            mail.setPreferredSendingEmailAddress("xxx@jxxx.com")

            present(mail, animated: true)   

        } else {
            //show failure alert
        }

        func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {

            controller.dismiss(animated: true, completion: nil)

        }

    }

可以正常编译并发送电子邮件，只是无法关闭控制器

Answer 1

所有委托方法都应在类范围内，在当前代码didFinishWith中，该代码应将邮件嵌套在sendEmail内

import UIKit
import MessageUI

class ViewController: UIViewController, MFMailComposeViewControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    @IBAction func sendEmail(_ sender: Any) { 
        sendEmail() 
    }

    func sendEmail() {
        if MFMailComposeViewController.canSendMail() {
            let mail = MFMailComposeViewController()
            mail.mailComposeDelegate = self
            mail.setToRecipients(["xxx@xx.com"])
            mail.setSubject("test  ")
            mail.setPreferredSendingEmailAddress("xxx@jxxx.com") 
            present(mail, animated: true)   

        } else {
            //show failure alert
        } 
    }

    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) { 
        controller.dismiss(animated: true, completion: nil) 
    }
}

无法关闭邮件视图控制器

1 个答案: