ios - MFMailComposeViewController 一直自动关闭

Question

这是一个非常奇怪的问题!我在屏幕上有一个按钮，按下它会使用以下代码启动 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];
}

此外，我的 View Controller 使用了正确的协议(protocol):

ViewController ()<MFMailComposeViewControllerDelegate>

我在模拟器上运行这个。

Answer 1

模拟器不支持

MFMailComposeViewController。您必须在设备上运行。