无法使用 MFMailComposeViewController 发送电子邮件

Question

我无法从我的应用程序内部在 MFMailComposeViewController 中发送电子邮件。我收到一条日志消息，表明电子邮件已发送，但它从未发送到我的帐户。我必须转到本机邮件应用程序并从发件箱发送。即使在本机应用程序中，也没有错误告诉我它失败的方式。我是否缺少隐私设置或其他内容？这原本工作得很好。我在 iOS 10 更新后遇到了这个问题。

-(void)sendEmail:(NSString*)email order:(NSMutableArray *)orderA{
MFMailComposeViewController *mail = [[MFMailComposeViewController alloc] init];
if ([MFMailComposeViewController canSendMail])
{

    mail.mailComposeDelegate = self;
    [mail setSubject:[NSString stringWithFormat:@"Order #%@ order", storeNum]];
    [mail setMessageBody:[orderA description] isHTML:NO];
    [mail setToRecipients:@[email]];
    [self presentViewController:mail animated:YES completion:nil];
}
else
{
    NSLog(@"This device cannot send email");
}
}
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
switch (result) {
    case MFMailComposeResultSent:
        NSLog(@"You sent the email.");
        break;
    case MFMailComposeResultSaved:
        NSLog(@"You saved a draft of this email");
        break;
    case MFMailComposeResultCancelled:
        NSLog(@"You cancelled sending this email.");
        break;
    case MFMailComposeResultFailed:
        NSLog(@"Mail failed:  An error occurred when trying to compose this email");
        break;
    default:
        NSLog(@"An error occurred when trying to compose this email");
        break;
}

[self dismissViewControllerAnimated:YES completion:nil];
}

Answer 1

- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
switch (result) {
    case MFMailComposeResultSent:
        NSLog(@"You sent the email.");
        break;
    case MFMailComposeResultSaved:
        NSLog(@"You saved a draft of this email");
        break;
    case MFMailComposeResultCancelled:
        NSLog(@"You cancelled sending this email.");
        break;
    case MFMailComposeResultFailed:
        NSLog(@"Mail failed:  An error occurred when trying to compose this email");
        break;
    default:
        NSLog(@"An error occurred when trying to compose this email");
        break;
}

[self dismissViewControllerAnimated:YES completion:NULL];
}


-(IBAction)mailClick:(id)sender{

if ([MFMailComposeViewController canSendMail])
{
    MFMailComposeViewController *mail = [[MFMailComposeViewController alloc] init];
    mail.mailComposeDelegate = self;
    [mail setSubject:@"Message from XYZ"];
    // [mail setMessageBody:@"Here is some main text in the email!" isHTML:NO];
    [mail setToRecipients:@[@"yourMail@gmail.com"]];

    [self presentViewController:mail animated:YES completion:NULL];
}
else
{

    NSLog(@"This device cannot send email");
}

}