Question

尝试发送一封电子邮件，调用以下方法，但我一直在努力并且不会显示电子邮件ios表单。

＆＃34;尝试提供MFMailComposeViewController：0x1560e1a00 Xamarin_Forms_Platform_iOS_PlatformRenderer：0x157b5c180 其视图不在窗口层次结构中！＆＃34;

我需要做些什么才能让它发挥作用？

     public void SendEmail()
     {
            string to="jo@gmail.com";
            string subject="Test";
            string body="This is a test email";

            if (MFMailComposeViewController.CanSendMail)
            {
                var mailComposeViewController = new MFMailComposeViewController();

                mailComposeViewController.SetToRecipients(new[] { to });
                mailComposeViewController.SetSubject(subject);
                mailComposeViewController.SetMessageBody(body, false);

                mailComposeViewController.Finished += (s, args) =>
                {
                    Xamarin.Forms.Device.BeginInvokeOnMainThread
                    (
                        () => { args.Controller.DismissViewController(true, null); }
                    );
                };

                UIApplication.SharedApplication.KeyWindow.RootViewController.PresentViewController(mailComposeViewController, true, null);
            }           
    }

Answer 1

我们应该在窗口顶部找到正确的rootviewController。

试试这个：

import Data.Char

checkLast :: String -> Bool
checkLast [] = False
checkLast cs = isUpper $ foldr1 seq cs

并将您的最后一行代码修改为

var rootController = ((AppDelegate)(UIApplication.SharedApplication.Delegate)).Window.RootViewController.ChildViewControllers[0].ChildViewControllers[1].ChildViewControllers[0];

无法使用xamarin ios实施发送电子邮件

1 个答案: