fix:issue #210

Ink Canvas/MainWindow_cs/MW_BoardControls.cs

@@ -191,9 +191,12 @@ namespace Ink_Canvas
                     RefreshBlackBoardSidePageListView();
                     AnimationsHelper.ShowWithSlideFromBottomAndFade(BoardBorderLeftPageListView);
                     await Task.Delay(1);
-                    ScrollViewToVerticalTop(
-                        (ListViewItem)BlackBoardLeftSidePageListView.ItemContainerGenerator.ContainerFromIndex(
-                            CurrentWhiteboardIndex - 1), BlackBoardLeftSidePageListScrollViewer);
+                    var leftContainer = BlackBoardLeftSidePageListView.ItemContainerGenerator.ContainerFromIndex(
+                        CurrentWhiteboardIndex - 1) as ListViewItem;
+                    if (leftContainer != null)
+                    {
+                        ScrollViewToVerticalTop(leftContainer, BlackBoardLeftSidePageListScrollViewer);
+                    }
                 }
             }
             else if (sender == BtnRightPageListWB)
@@ -208,9 +211,12 @@ namespace Ink_Canvas
                     RefreshBlackBoardSidePageListView();
                     AnimationsHelper.ShowWithSlideFromBottomAndFade(BoardBorderRightPageListView);
                     await Task.Delay(1);
-                    ScrollViewToVerticalTop(
-                        (ListViewItem)BlackBoardRightSidePageListView.ItemContainerGenerator.ContainerFromIndex(
-                            CurrentWhiteboardIndex - 1), BlackBoardRightSidePageListScrollViewer);
+                    var rightContainer = BlackBoardRightSidePageListView.ItemContainerGenerator.ContainerFromIndex(
+                        CurrentWhiteboardIndex - 1) as ListViewItem;
+                    if (rightContainer != null)
+                    {
+                        ScrollViewToVerticalTop(rightContainer, BlackBoardRightSidePageListScrollViewer);
+                    }
                 }
             }
 

Ink Canvas/MainWindow_cs/MW_FloatingBarIcons.cs

@@ -2134,6 +2134,11 @@ namespace Ink_Canvas
                 SaveStrokes();
             }
 
+            if (!isAlreadyEraser)
+            {
+                ResetTouchStates();
+            }
+
             // 启用新的高级橡皮擦系统
             EnableAdvancedEraserSystem();
 
@@ -2732,6 +2737,61 @@ namespace Ink_Canvas
 
             if (isSingleFingerDragMode) BtnFingerDragMode_Click(BtnFingerDragMode, null);
             isLongPressSelected = false;
+
+            ResetTouchStates();
+        }
+        
+        /// <summary>
+        /// 重置所有触摸相关状态，
+        /// </summary>
+        private void ResetTouchStates()
+        {
+            try
+            {
+                // 清空触摸点计数器
+                dec.Clear();
+                
+                // 重置多指触摸模式状态
+                if (isInMultiTouchMode)
+                {
+                    isInMultiTouchMode = false;
+                }
+                
+                // 重置单指拖动模式状态
+                if (isSingleFingerDragMode)
+                {
+                    isSingleFingerDragMode = false;
+                    if (BtnFingerDragMode != null)
+                    {
+                        BtnFingerDragMode.Content = "单指\n拖动";
+                    }
+                }
+                
+                // 重置手掌擦状态
+                if (isPalmEraserActive)
+                {
+                    isPalmEraserActive = false;
+                    palmEraserTouchDownHandled = false;
+                    palmEraserTouchIds.Clear();
+                    StopPalmEraserRecoveryTimer();
+                }
+                
+                // 确保触摸事件能正常响应
+                inkCanvas.IsHitTestVisible = true;
+                inkCanvas.IsManipulationEnabled = true;
+                
+                // 释放所有触摸捕获
+                inkCanvas.ReleaseAllTouchCaptures();
+                
+                // 恢复UI元素的触摸响应
+                ViewboxFloatingBar.IsHitTestVisible = true;
+                BlackboardUIGridForInkReplay.IsHitTestVisible = true;
+                
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"重置触摸状态失败: {ex.Message}", LogHelper.LogType.Error);
+            }
         }
 
         private void BtnHideControl_Click(object sender, RoutedEventArgs e)

Ink Canvas/MainWindow_cs/MW_PageListView.cs

@@ -68,9 +68,20 @@ namespace Ink_Canvas
 
         public static void ScrollViewToVerticalTop(FrameworkElement element, ScrollViewer scrollViewer)
         {
+            if (element == null || scrollViewer == null)
+            {
+                return;
+            }
+
             var scrollViewerOffset = scrollViewer.VerticalOffset;
             var point = new Point(0, scrollViewerOffset);
-            var tarPos = element.TransformToVisual(scrollViewer).Transform(point);
+            var transform = element.TransformToVisual(scrollViewer);
+            if (transform == null)
+            {
+                return;
+            }
+            
+            var tarPos = transform.Transform(point);
             scrollViewer.ScrollToVerticalOffset(tarPos.Y);
         }
 

Ink Canvas/MainWindow_cs/MW_TouchEvents.cs

@@ -968,6 +968,12 @@ namespace Ink_Canvas
 
             // 修复：允许单指拖动选中的墨迹，即使禁用了多指手势
             if (isInMultiTouchMode) return;
+                
+            if (dec.Count == 0 && (isSingleFingerDragMode || isInMultiTouchMode))
+            {
+                ResetTouchStates();
+                return;
+            }
 
             // 如果是单指拖动选中的墨迹，允许处理
             if (dec.Count == 1 && inkCanvas.GetSelectedStrokes().Count > 0)