diff --git a/SunnyUI/Controls/UITabControl.cs b/SunnyUI/Controls/UITabControl.cs
index 406cc5bf..7eefde51 100644
--- a/SunnyUI/Controls/UITabControl.cs
+++ b/SunnyUI/Controls/UITabControl.cs
@@ -850,7 +850,7 @@ namespace Sunny.UI
             {
                 if (AutoClosePage)
                 {
-                    Frame.DealPageRemoved(pages[i]);
+                    Frame?.DealPageRemoved(pages[i]);
 
                     try
                     {
diff --git a/SunnyUI/Frames/UIPage.cs b/SunnyUI/Frames/UIPage.cs
index 2ef2d6a8..3f2bb1b2 100644
--- a/SunnyUI/Frames/UIPage.cs
+++ b/SunnyUI/Frames/UIPage.cs
@@ -454,7 +454,7 @@ namespace Sunny.UI
         public virtual void Init()
         {
             Initialize?.Invoke(this, new EventArgs());
-            Frame.DealPageSelected(this);
+            Frame?.DealPageSelected(this);
         }
 
         protected override void OnLoad(EventArgs e)