From 60ba488219b195b493bde077448b0ab82cd26f32 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=9B=E5=B0=98=E7=A9=BA=E5=BF=A7?=
 <wckfxxjstdwckyxphdhqxg@outlook.com>
Date: Wed, 13 Nov 2024 06:14:08 +0800
Subject: [PATCH] fix:Go to AspectRatioLayout demo and go to another and go
 back, the demo will crash.

---
 .../AspectRatioLayout/AspectRatioLayout.cs    | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/src/Ursa/Controls/AspectRatioLayout/AspectRatioLayout.cs b/src/Ursa/Controls/AspectRatioLayout/AspectRatioLayout.cs
index e1f7da5..86a372f 100644
--- a/src/Ursa/Controls/AspectRatioLayout/AspectRatioLayout.cs
+++ b/src/Ursa/Controls/AspectRatioLayout/AspectRatioLayout.cs
@@ -11,7 +11,7 @@ public class AspectRatioLayout : TransitioningContentControl
 {
     public static readonly StyledProperty<List<AspectRatioLayoutItem>> ItemsProperty =
         AvaloniaProperty.Register<AspectRatioLayout, List<AspectRatioLayoutItem>>(
-            nameof(Items), new List<AspectRatioLayoutItem>());
+            nameof(Items));
 
     public static readonly StyledProperty<double> AspectRatioChangeAmbiguityProperty =
         AvaloniaProperty.Register<AspectRatioLayout, double>(
@@ -21,12 +21,6 @@ public class AspectRatioLayout : TransitioningContentControl
         AvaloniaProperty.Register<AspectRatioLayout, AspectRatioMode>(
             nameof(CurrentAspectRatioMode));
 
-    public AspectRatioMode CurrentAspectRatioMode
-    {
-        get => GetValue(CurrentAspectRatioModeProperty);
-        set => SetValue(CurrentAspectRatioModeProperty, value);
-    }
-
     private readonly Queue<bool> _history = new();
 
     static AspectRatioLayout()
@@ -40,6 +34,17 @@ public class AspectRatioLayout : TransitioningContentControl
         PageTransitionProperty.OverrideDefaultValue<AspectRatioLayout>(pCrossFade);
     }
 
+    public AspectRatioLayout()
+    {
+        Items = new List<AspectRatioLayoutItem>();
+    }
+
+    public AspectRatioMode CurrentAspectRatioMode
+    {
+        get => GetValue(CurrentAspectRatioModeProperty);
+        set => SetValue(CurrentAspectRatioModeProperty, value);
+    }
+
     protected override Type StyleKeyOverride => typeof(TransitioningContentControl);
 
     [Content]