MFMailComposeViewController 不会关闭

Question

按照向我展示如何实现应用内邮件的教程进行操作后，取消按钮和发送按钮似乎无法关闭视图。

现在我在这里阅读了一些评论，说我应该实现这种方法：

-(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
[self dismissModalViewControllerAnimated:YES];
}

但这并不能解决问题，不是在模拟器中还是在我的iPhone 4上 - 消息确实会发送，但视图不会关闭。

这是我到目前为止的代码：

#pragma mark - InApp Mail
- (IBAction)openMail:(id)sender
{
if ([MFMailComposeViewController canSendMail])
{
    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];

    [mailer setSubject:@"iOS School - MultipleAlertViews"];
    NSArray *toRecipients = [NSArray arrayWithObjects:@"", nil];
    [mailer setToRecipients:toRecipients];
    // Attach an image to the email
    NSString *pathFile01 = @"http://dl.dropbox.com/u/61711378/iOS%20School%20-%20Docs/MultipleAlertViewsVCh.pdf";
    NSURL *pdfURLFile01 = [NSURL URLWithString:pathFile01];
    NSData *pdfDataFile01 = [NSData dataWithContentsOfURL:pdfURLFile01];
    [mailer addAttachmentData:pdfDataFile01 mimeType:@"application/pdf" fileName:@"MultipleAlertViewsVCh.pdf"];
    NSString *pathFile02 = @"http://dl.dropbox.com/u/61711378/iOS%20School%20-%20Docs/MultipleAlertViewsVCm.pdf";
    NSURL *pdfURLFile02 = [NSURL URLWithString:pathFile02];
    NSData *pdfDataFile02 = [NSData dataWithContentsOfURL:pdfURLFile02];
    [mailer addAttachmentData:pdfDataFile02 mimeType:@"application/pdf" fileName:@"MultipleAlertViewsVCm.pdf"];

    NSString *emailBody = 
    @"Hello,<br/><br/>You requested code for this project, which you can now use in XCode <br/><br/> You will find 2 Attachements.<br/>One is the Header file and the other is the Implementation file.<br/><br/>Thank you for using this app, if you find it useful, don't forget to give it a Rating in the App Store.<br/><br/>Kind Regards,<br/>iOS School";

    [mailer setMessageBody:emailBody isHTML:YES];
    [self presentModalViewController:mailer animated:YES];
}
else
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Failure"
                                                    message:@"Your device doesn't support the composer sheet"
                                                   delegate:nil
                                          cancelButtonTitle:@"OK"
                                          otherButtonTitles:nil];
    [alert show];
}
}
- (void)mailComposeController:(MFMailComposeViewController*)controller    didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
switch (result)
{
    case MFMailComposeResultCancelled:
        NSLog(@"Mail cancelled: you cancelled the operation and no email message was queued.");
        break;
    case MFMailComposeResultSaved:
        NSLog(@"Mail saved: you saved the email message in the drafts folder.");
        break;
    case MFMailComposeResultSent:
        NSLog(@"Mail send: the email message is queued in the outbox. It is ready to send.");
        break;
    case MFMailComposeResultFailed:
        NSLog(@"Mail failed: the email message was not saved or queued, possibly due to an error.");
        break;
    default:
        NSLog(@"Mail not sent.");
        break;
}
// Remove the mail view
[self dismissModalViewControllerAnimated:YES];
}

如您所见，我已经实现了 - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error

但它不起作用 - 我缺少任何其他内容 - 我正在使用iOS 5.1

干杯杰夫

Answer 1

你已经实现了委托方法，但尚未设置委托：

mailer.mailComposeDelegate = self;

创建mailer .