您可以将 UIAlertController 与 UIAlertControllerStyle.ActionSheet 一起使用。我有 Xamarin.ios 代码。
var okCancelAlertController = UIAlertController.Create("", "Choose",
UIAlertControllerStyle.ActionSheet);
//Add Actions
okCancelAlertController.AddAction(UIAlertAction.Create("iCloud", UIAlertActionStyle.Default, (s) => { }));
okCancelAlertController.AddAction(UIAlertAction.Create("Photos", UIAlertActionStyle.Default, (s) => { }));
okCancelAlertController.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel, (s) => { }));
UIApplication.SharedApplication.KeyWindow.RootViewController.PresentViewController(okCancelAlertController, true, null);