应用程序中的按钮打开电子邮件但不会关闭窗口并返回应用程序答案

【问题标题】：button from app opens email but won't close the window and return to app应用程序中的按钮打开电子邮件但不会关闭窗口并返回应用程序
【发布时间】：2015-12-15 23:50:14
【问题描述】：

我的应用程序中有一个按钮，可以打开一封要发送给我的电子邮件，当按下此按钮时，iPhone 上的电子邮件应用程序会打开，当按下发送时，电子邮件会发送，但窗口不会关闭并且然后返回我的应用程序。此外，当我按下取消时，它会提供保存/删除草稿的选项，但不会再次关闭窗口并返回我的应用程序。我在下面附上了电子邮件代码。

@IBAction func SendMessage(sender: AnyObject) {

var mail: MFMailComposeViewController!

let toRecipients = ["usalim76@gmail.com"]
let subject = "Enquiry"
let body = "Your body text"

mail = MFMailComposeViewController()
mail.mailComposeDelegate = self
mail.setToRecipients(toRecipients)
mail.setSubject(subject)
mail.setMessageBody(body, isHTML: true)

presentViewController(mail, animated: true, completion: nil)

func mailComposeController(controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?) {
  controller.presentingViewController?.dismissViewControllerAnimated(true, completion: nil)
}


}

【问题讨论】：

标签： ios swift email mfmailcomposeviewcontroller

【解决方案1】：

你好像忘了实现MFMailComposeViewControllerDelegate，添加这个：

func mailComposeController(controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?) {
      controller.presentingViewController?.dismissViewControllerAnimated(true, completion: nil)       
}

【讨论】：

仍然有同样的问题，窗口没有关闭并返回我的应用程序，我已经编辑了上面的代码

【解决方案2】：

设法修复它！

     @IBAction func SendMessage(sender: AnyObject) {

    let mailComposeViewController = configuredMailComposeViewController()
    if MFMailComposeViewController.canSendMail() {
        self.presentViewController(mailComposeViewController, animated:             true, completion: nil)
    } else {
        self.showSendMailErrorAlert()
    }
}

func configuredMailComposeViewController() -> MFMailComposeViewController {
    let mailComposerVC = MFMailComposeViewController()
    mailComposerVC.mailComposeDelegate = self // Extremely important to set the --mailComposeDelegate-- property, NOT the --delegate-- property

    mailComposerVC.setToRecipients(["someone@somewhere.com"])
    mailComposerVC.setSubject("Sending you an in-app e-mail...")
    mailComposerVC.setMessageBody("Sending e-mail in-app is not so bad!", 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()
}

// MARK: MFMailComposeViewControllerDelegate Method
func mailComposeController(controller: MFMailComposeViewController!, didFinishWithResult result: MFMailComposeResult, error: NSError!) {
    controller.dismissViewControllerAnimated(true, completion: nil)
}
}

【讨论】：