我正在使用Xamarin(C#)编写适用于iOS的应用程序。iOS中Android的“toast通知”相当于什么？来自documentation:Atoastprovidessimplefeedbackaboutanoperationinasmallpopup.Itonlyfillstheamountofspacerequiredforthemessageandthecurrentactivityremainsvisibleandinteractive.Forexample,navigatingawayfromanemailbeforeyousendittriggersa"Drafts