Fix Crashing issue with keyboard scrolling iOS (#28148)

* check the window

* check each responders window

* check LastScrollView Window

Author: tj-devel709

src/Core/src/Platform/iOS/KeyboardAutoManagerScroll.cs

@@ -184,7 +184,7 @@ static void WillHideKeyboard(NSNotification notification)
 	{
 		notification.UserInfo?.SetAnimationDuration();
 
-		if (LastScrollView is not null)
+		if (LastScrollView?.Window is not null)
 		{
 			UIView.Animate(AnimationDuration, 0, UIViewAnimationOptions.CurveEaseOut, AnimateHidingKeyboard, () => { });
 		}

src/Core/src/Platform/iOS/ViewExtensions.cs

@@ -821,6 +821,13 @@ internal static void UpdateLayerBorder(this CoreAnimation.CALayer layer, IButton
 			var nextResponder = view as UIResponder;
 			while (nextResponder is not null)
 			{
+				// We check for Window to avoid scenarios where an invalidate might propagate up the tree
+				// To a SuperView that's been disposed which will cause a crash when trying to access it
+				if (nextResponder is UIView uiview && uiview.Window is null)
+				{
+					return null;
+				}
+
 				nextResponder = nextResponder.NextResponder;
 
 				if (nextResponder is T responder)
@@ -834,6 +841,13 @@ internal static void UpdateLayerBorder(this CoreAnimation.CALayer layer, IButton
 			var nextResponder = controller.View as UIResponder;
 			while (nextResponder is not null)
 			{
+				// We check for Window to avoid scenarios where an invalidate might propagate up the tree
+				// To a SuperView that's been disposed which will cause a crash when trying to access it
+				if (nextResponder is UIView uiview && uiview.Window is null)
+				{
+					return null;
+				}
+
 				nextResponder = nextResponder.NextResponder;
 
 				if (nextResponder is T responder && responder != controller)