From da45aaf54b5a60bfb495c9b495205a4b34efbfcc Mon Sep 17 00:00:00 2001
From: Isabelle Santin <isabelle@chosenfewsoftware.com>
Date: Mon, 8 Sep 2025 10:51:02 -0500
Subject: [PATCH] Fix crashing bug with iOS VoiceOver scroll gesture

---
 src/iOS/Avalonia.iOS/AutomationPeerWrapper.cs | 20 +++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/iOS/Avalonia.iOS/AutomationPeerWrapper.cs b/src/iOS/Avalonia.iOS/AutomationPeerWrapper.cs
index 2dceac149b..f0cc7ed3be 100644
--- a/src/iOS/Avalonia.iOS/AutomationPeerWrapper.cs
+++ b/src/iOS/Avalonia.iOS/AutomationPeerWrapper.cs
@@ -321,23 +321,23 @@ namespace Avalonia.iOS
                 switch (direction)
                 {
                     case UIAccessibilityScrollDirection.Up:
-                        verticalAmount = ScrollAmount.SmallIncrement;
+                        verticalAmount = ScrollAmount.LargeIncrement;
                         horizontalAmount = ScrollAmount.NoAmount;
                         didScroll = true;
                         break;
                     case UIAccessibilityScrollDirection.Down:
-                        verticalAmount = ScrollAmount.SmallDecrement;
+                        verticalAmount = ScrollAmount.LargeDecrement;
                         horizontalAmount = ScrollAmount.NoAmount;
                         didScroll = true;
                         break;
                     case UIAccessibilityScrollDirection.Left:
                         verticalAmount = ScrollAmount.NoAmount;
-                        horizontalAmount = ScrollAmount.SmallIncrement;
+                        horizontalAmount = ScrollAmount.LargeIncrement;
                         didScroll = true;
                         break;
                     case UIAccessibilityScrollDirection.Right:
                         verticalAmount = ScrollAmount.NoAmount;
-                        horizontalAmount = ScrollAmount.SmallDecrement;
+                        horizontalAmount = ScrollAmount.LargeDecrement;
                         didScroll = true;
                         break;
                     default:
@@ -347,12 +347,16 @@ namespace Avalonia.iOS
                         break;
                 }
 
-                scrollProvider.Scroll(verticalAmount, horizontalAmount);
-                if (didScroll)
+                try
                 {
-                    UIAccessibility.PostNotification(UIAccessibilityPostNotification.PageScrolled, null);
-                    return true;
+                    scrollProvider.Scroll(verticalAmount, horizontalAmount);
+                    if (didScroll)
+                    {
+                        UIAccessibility.PostNotification(UIAccessibilityPostNotification.PageScrolled, null);
+                        return true;
+                    }
                 }
+                catch (InvalidOperationException) { }
             }
             return false;
         }