MFMailComposeViewController保持自动关闭

Question

这是个很奇怪的问题！我在屏幕上有一个按钮，当按下该按钮时，将使用以下代码启动MFMailComposeViewController：

-(IBAction) openComposeEmailScreen:(id) sender {

    if([MFMailComposeViewController canSendMail]) {

        MFMailComposeViewController *mailComposeViewController = [[MFMailComposeViewController alloc] init];
        mailComposeViewController.mailComposeDelegate = self;

        [mailComposeViewController setToRecipients:[NSArray arrayWithObject:@"johndoe@gmail.com"]];
        [mailComposeViewController setSubject:@"HelloWorld"];

        NSLog(@"%@",_pasteBoard.string);

        [mailComposeViewController setMessageBody:_pasteBoard.string isHTML:NO];

        [self presentViewController:mailComposeViewController animated:YES completion:nil];
    }
}

-(void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {

    if(error) {
        NSLog(@"%@",error.localizedDescription);
    }

    [self dismissViewControllerAnimated:YES completion:nil];
}

另外，我的视图控制器使用了正确的协议：

ViewController ()<MFMailComposeViewControllerDelegate>

我在模拟器上运行这个。

Answer 1

模拟器中不支持MFMailComposeViewController。你得用一台设备运行。