使用MFMailComposeViewController从应用程序发送电子邮件时出现问题

问题描述

我在尝试从我的应用程式传送电子邮件时遇到了一些困难。
我试过这个代码从iCodeBlog（http://icodeblog.com/2009/11/18/iphone-coding-tutorial-in-application-emailing/）

I'm having some hard time trying to send an email from my app.I tried this code from iCodeBlog (http://icodeblog.com/2009/11/18/iphone-coding-tutorial-in-application-emailing/)

-(void)sendEmail:(id)sender
{
    MFMailComposeViewController *mail = [[MFMailComposeViewController alloc] init];
    mail.mailComposeDelegate = self;
    if ([MFMailComposeViewController canSendMail]) {
            //Setting up the Subject, recipients, and message body.
        [mail setToRecipients:[NSArray arrayWithObjects:@"[email protected]",nil]];
        [mail setSubject:@"Subject of Email"];
        [mail setMessageBody:@"Message of email" isHTML:NO];
            //Present the mail view controller
        [self presentModalViewController:mail animated:YES];
    }
        //release the mail
    [mail release];
}
    //This is one of the delegate methods that handles success or failure
    //and dismisses the mail
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
    [self dismissModalViewControllerAnimated:YES];
    if (result == MFMailComposeResultFailed) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Message Failed!" message:@"Your email has failed to send" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
        [alert show];
        [alert release];
    }
}

它说它发送电子邮件，没有错误，我的收件箱中的电子邮件。
我试图将它们发送到不同的电子邮件帐户，并尝试从不同的帐户发送，也没有错误发生，但我从来没有收到电子邮件。
任何想法？

It says it send the email and no error occurs but I never get the email in my inbox.I tried sending them to different email accounts and tried sending them from different accounts as well, no error occurs but I never get the email.Any ideas?

如果重要，当我开始输入电子邮件时，在调试器控制台上收到此消息

If it's important, I get this message on the Debugger Console when I start typing the To: email

============== ===================== EDIT ========================== ============
我刚刚意识到，所有这些电子邮件都发送到我的发件箱Mail.app。当我点击发送时，他们不是自动发送的吗？如果没有，那么当用户按下MFMailComposeView上的发送按钮时，我可以做什么来发送它们？

===================================== EDIT ======================================I just realized that all those emails were sent to my Outbox on Mail.app. Aren't they sent automatically when I click send? If not, then what can I do to make them be sent when the user presses the Send button on MFMailComposeView? Or perhaps call the Mail.app and make those emails be sent.

推荐答案

使用这段代码肯定会有效：

Use this code this will definitely work:

    -(IBAction)send{

        [self callMailComposer];
    }

    -(void)callMailComposer{

        Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));
        if (mailClass != nil)
        {
        // We must always check whether the current device is configured for sending emails
            if ([mailClass canSendMail])
                [self displayComposerSheet];
            else
                [self launchMailAppOnDevice];
        }

        else
        {
            [self launchMailAppOnDevice];
        }
    }


    #pragma mark -
    #pragma mark Compose Mail
    #pragma mark

    // Displays an email composition interface inside the application. Populates all the Mail fields.
    -(void)displayComposerSheet{

        MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];


        picker.mailComposeDelegate = self;
        NSString *tosubject =@"";
        [picker setSubject:tosubject];


        // Set up recipients
        [picker setCcRecipients:nil];
        [picker setBccRecipients:nil];

        [picker setToRecipients:nil];



        [picker setMessageBody:strNewsLink isHTML:NO];

        [self presentModalViewController:picker animated:YES];

        if(picker) [picker release];
        if(picker) picker=nil;

    }


    // Dismisses the email composition interface when users tap Cancel or Send. Proceeds to update the message field with the result of the operation.

        - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
  NSString* alertMessage;
  // message.hidden = NO;
  // Notifies users about errors associated with the interface
  switch (result)
  {
    case MFMailComposeResultCancelled:
      alertMessage = @"Email composition cancelled";
      break;
    case MFMailComposeResultSaved:
      alertMessage = @"Your e-mail has been saved successfully";

      break;
    case MFMailComposeResultSent:
      alertMessage = @"Your email has been sent successfully";

      break;
    case MFMailComposeResultFailed:
      alertMessage = @"Failed to send email";

      break;
    default:
      alertMessage = @"Email Not Sent";

      break;
  }

  UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:@"My app name"
                                                      message:alertMessage
                                                     delegate:nil
                                            cancelButtonTitle:@"OK"
                                            otherButtonTitles:nil];
  [alertView show];
  [self dismissModalViewControllerAnimated:YES];
}


    #pragma mark
    #pragma mark Workaround
    #pragma mark
    // Launches the Mail application on the device.

        -(void)launchMailAppOnDevice{

        NSString *recipients = @"mailto:?cc=&subject=";
        NSString *body = @"&body=";
        NSString *email = [NSString stringWithFormat:@"%@%@", recipients, body];
        email = [email stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:email]];

    }

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