ios - 使用 Swift 实现应用内电子邮件失败

Question

我想用swift实现应用内邮件。当我单击该按钮时，会弹出电子邮件窗口。但是，我无法发送电子邮件。而且，点击取消-删除草稿后，我无法返回到原来的屏幕。

import UIkit
import MessageUI


class Information : UIViewController, MFMailComposeViewControllerDelegate{

    var myMail: MFMailComposeViewController!

    @IBAction func sendReport(sender : AnyObject) {

        if(MFMailComposeViewController.canSendMail()){
            myMail = MFMailComposeViewController()

            //myMail.mailComposeDelegate

            // set the subject
            myMail.setSubject("My report")

            //To recipients
            var toRecipients = ["lipeilin@gatech.edu"]
            myMail.setToRecipients(toRecipients)

            //CC recipients
            var ccRecipients = ["tzhang85@gatech.edu"]
            myMail.setCcRecipients(ccRecipients)

            //CC recipients
            var bccRecipients = ["tzhang85@gatech.edu"]
            myMail.setBccRecipients(ccRecipients)

            //Add some text to the message body
            var sentfrom = "Email sent from my app"
            myMail.setMessageBody(sentfrom, isHTML: true)

            //Include an attachment
            var image = UIImage(named: "Gimme.png")
            var imageData = UIImageJPEGRepresentation(image, 1.0)

            myMail.addAttachmentData(imageData, mimeType: "image/jped", fileName:     "image")

            //Display the view controller
            self.presentViewController(myMail, animated: true, completion: nil)
        }
        else{
            var alert = UIAlertController(title: "Alert", message: "Your device cannot send emails", preferredStyle: UIAlertControllerStyle.Alert)
            alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
            self.presentViewController(alert, animated: true, completion: nil)


        }
    }




func mailComposeController(controller: MFMailComposeViewController!,
    didFinishWithResult result: MFMailComposeResult,
    error: NSError!){

        switch(result.value){
        case MFMailComposeResultSent.value:
            println("Email sent")

        default:
            println("Whoops")
        }

        self.dismissViewControllerAnimated(true, completion: nil)

}
}

Answer 1

因为你没有将当前 View Controller 设置为 myMail 的 mailComposeDelegate，所以 mailComposeController:didFinishWithResult 方法没有被调用.初始化 myMail 后，确保添加:

myMail.mailComposeDelegate = self

然后你就可以开始了