邮件撰写视图控制器无法从 UIAlertController 打开

Question

我试图在从 UIAlertController 按下按钮后启动邮件撰写视图控制器。在模拟器中，当我尝试打开邮件时，我总是在模拟器中收到正常的崩溃和错误消息，但在应用程序中，我什么也得不到。没有控制器，没有崩溃，什么都没有。这是代码。

[actionSheet addAction:[UIAlertAction actionWithTitle:@"Email" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

        [self emailThem];

        [self dismissViewControllerAnimated:YES completion:^{
        }];
    }]];

-(void) emailThem {
    NSLog(@"EMAIL");
    MFMailComposeViewController *mail = [[MFMailComposeViewController alloc] init];
    mail.mailComposeDelegate = self;
    [mail setSubject:@"To P3 Media"];
    [mail setMessageBody:@"Replace this text with your message for all the information you would like on P3 Media." isHTML:NO];
    [mail setToRecipients:@[@"p3media2014@gmail.com"]];

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

有什么问题？

Answer 1

试试这个代码

[actionSheet addAction:[UIAlertAction actionWithTitle:@"Email" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

    [self emailThem];

    [self dismissViewControllerAnimated:YES completion:^{
    }];
}]];

-(void) emailThem {
    NSLog(@"EMAIL");
    MFMailComposeViewController *mail = [[MFMailComposeViewController alloc] init];
    mail.mailComposeDelegate = self;
    [mail setSubject:@"To P3 Media"];
    [mail setMessageBody:@"Replace this text with your message for all the information you would like on P3 Media." isHTML:NO];
    [mail setToRecipients:@[@"p3media2014@gmail.com"]];
    dispatch_async(dispatch_get_main_queue(),^{
        [self presentViewController:mail animated:YES completion:NULL];
    });
}

邮件撰写视图控制器无法从 UIAlertController 打开

Mail Compose View Controller Won't Open From UIAlertController

ios

uialertcontroller

mfmailcomposeviewcontroller