Xamarin.ios 表单在UIDocumentInteractionController中看不到打印选项

为什么我看不到菜单中的打印选项我错过了什么

private void OpenExtrnal()
        {


            Xamarin.Forms.Device.BeginInvokeOnMainThread(() =>
            {

                UIView parentView = UIApplication.SharedApplication.KeyWindow.RootViewController.View;
                CGRect buttonFrame = new CGRect( 0 , -260 , 320 , 320);
                var PreviewController = UIDocumentInteractionController.FromUrl(new NSUrl(localDocUrl, true));
                PreviewController.Delegate = new UIDocumentInteractionControllerDelegateClass(UIApplication.SharedApplication.KeyWindow.RootViewController);
                if(passedImage != null && Device.Idiom == TargetIdiom.Tablet){
                    buttonFrame = FormsViewToNativeiOS.ConvertFormsToNative(passedImage).Frame;
                }

                PreviewController.PresentOpenInMenu(buttonFrame , parentView ,  true);
            });
        }

代理类

public class UIDocumentInteractionControllerDelegateClass : UIDocumentInteractionControllerDelegate
    {
        UIViewController viewC;

        public UIDocumentInteractionControllerDelegateClass(UIViewController controller)
        {
            viewC = controller;
        }

        public override UIViewController ViewControllerForPreview(UIDocumentInteractionController controller)
        {
            return viewC;
        }

        public override UIView ViewForPreview(UIDocumentInteractionController controller)
        {
            return viewC.View;
        }


    }

---

您必须使用

PreviewController.presentoptions菜单

而不是

PreviewController.presentoptions菜单

来显示诸如“打印”之类的选项

PresentOpenInMenu

和

PresentOptions Menu

之间的区别如下：

• 要向用户提示一组选项，包括在另一个应用程序中打开文件的选项，请调用

  presentoptions menufromrect:inView:animated:

  或

  presentoptions menufrombarbuttonItem:animated:

  方法
• 要提示用户仅在另一个应用程序中打开文件，请调用

  presentOpenMinumeFromRect:inView:animated:

  或

  presentOpenMinumeFromBarbuttonItem:animated:

  方法

---

请参阅苹果文档：。

Hi@Mina，我的答案对您有帮助吗？如果我的答案有帮助，请接受。这对我很重要。谢谢：）