ios - 在 tableView 中实现 MailComposeController

Question

我已经在 TableView 中创建了设置页面。当我点击第 0 行时，调用 UIActivityViewController。当我点击第 2 行时，将调用 MailComposeController。

MailComposeController 已调用，但当我点击邮件屏幕上的取消或发送按钮时它不起作用。

代码如下。

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        if indexPath.row == 0 {

            let message = "Hey download my app [LINK]"
            let shareView = UIActivityViewController(activityItems: [message], applicationActivities: nil)
            self.present(shareView, animated: true, completion: nil)

        } else if indexPath.row == 1 {
            let mailCompose = MFMailComposeViewController()

            mailCompose.mailComposeDelegate = self

            mailCompose.setToRecipients(["address@gmail.com"])

            mailCompose.setSubject("feedback")

            mailCompose.setMessageBody("text", isHTML: false)

            if MFMailComposeViewController.canSendMail()

            {
                self.present(mailCompose, animated: true, completion: nil)
            }

            else{

                print("error...!")

            }
        }



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

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

        }

Answer 1

您必须将委托(delegate)方法放在 ViewController 中，而不是放在 tableView:didSelectRowAt 方法中:

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