From b918809dca8dcd5696f7ddf90cd10f635d0707d0 Mon Sep 17 00:00:00 2001
From: CJKmkp <2564608840@qq.com>
Date: Sat, 15 Nov 2025 18:06:36 +0800
Subject: [PATCH] =?UTF-8?q?improve:=E7=BA=BF=E6=93=A6=E6=93=A6=E9=99=A4?=
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---
 Ink Canvas/MainWindow_cs/MW_TouchEvents.cs | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/Ink Canvas/MainWindow_cs/MW_TouchEvents.cs b/Ink Canvas/MainWindow_cs/MW_TouchEvents.cs
index e0878d90..31525760 100644
--- a/Ink Canvas/MainWindow_cs/MW_TouchEvents.cs	
+++ b/Ink Canvas/MainWindow_cs/MW_TouchEvents.cs	
@@ -391,12 +391,20 @@ namespace Ink_Canvas
             {
                 var stroke = GetStrokeVisual(e.StylusDevice.Id).Stroke;
 
-                inkCanvas.Strokes.Add(stroke);
-                await Task.Delay(5);
-                inkCanvas.Children.Remove(GetVisualCanvas(e.StylusDevice.Id));
+                if (stroke != null)
+                {
+                    inkCanvas.Strokes.Add(stroke);
+                    await Task.Delay(5);
+                    inkCanvas.Children.Remove(GetVisualCanvas(e.StylusDevice.Id));
 
-                inkCanvas_StrokeCollected(inkCanvas,
-                new InkCanvasStrokeCollectedEventArgs(stroke));
+                    inkCanvas_StrokeCollected(inkCanvas,
+                    new InkCanvasStrokeCollectedEventArgs(stroke));
+                }
+                else
+                {
+                    await Task.Delay(5);
+                    inkCanvas.Children.Remove(GetVisualCanvas(e.StylusDevice.Id));
+                }
             }
             catch (Exception ex)
             {