ios - MFMailComposeViewController 返回和发送按钮不起作用

Question

我尝试使用 MFMailComposeViewController 在我的应用程序中发送电子邮件。

let email = "..."

let mailComposer = MFMailComposeViewController()

mailComposer.mailComposeDelegate = self                
mailComposer.setToRecipients([email])

self.navigationController?.present(mailComposer, animated: true)

运行我的应用程序后，显示 Composer 屏幕，但未显示 cancel 和 send 按钮。我尝试了很多可能的解决方案，如在两个导航 Controller 中更改 tintColor。例如:

mailComposer.navigationBar.tintColor = .red

但“问题”仍然存在。

有什么想法吗？

Answer 1

请尝试这些代码

class TechSupportVC: UIViewController, MFMailComposeViewControllerDelegate {
    let composeVC = MFMailComposeViewController()

override func viewDidLoad() {
    super.viewDidLoad()

    composeVC.mailComposeDelegate = self
    composeVC.setToRecipients(["desiredEmail@gmail.com"])
    composeVC.setSubject("My message")
}

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

@IBAction func sendPressed(_ sender: Any) {
    guard MFMailComposeViewController.canSendMail() else {
        showMailServiceErrorAlert()
        return
    }

    composeVC.setMessageBody("Test credentials: \(firstAndLastNameTextField.text!)\nPhone: \(numberTextField.text!)\n\n\(messageTextView.text!)", isHTML: false)

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