From 299f4b1218c0d3721aa92bf091950d6708942583 Mon Sep 17 00:00:00 2001
From: JLChen <551775569@qq.com>
Date: 星期六, 28 八月 2021 15:45:12 +0800
Subject: [PATCH] Merge remote-tracking branch 'origin/newBranch1' into WJC

---
 HDL_ON/UI/UI2/2-Classification/ClassificationPageBLL.cs |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/HDL_ON/UI/UI2/2-Classification/ClassificationPageBLL.cs b/HDL_ON/UI/UI2/2-Classification/ClassificationPageBLL.cs
index 7012fba..bf04c98 100644
--- a/HDL_ON/UI/UI2/2-Classification/ClassificationPageBLL.cs
+++ b/HDL_ON/UI/UI2/2-Classification/ClassificationPageBLL.cs
@@ -442,8 +442,11 @@
                     {
                         Application.RunOnMainThread(() =>
                         {
-                            waitPage.Hide();
-                            waitPage.RemoveFromParent();
+                            if (waitPage != null)
+                            {
+                                waitPage.RemoveFromParent();
+                                waitPage = null;
+                            }
                         });
                     }
                 })
@@ -488,8 +491,11 @@
                     {
                         Application.RunOnMainThread(() =>
                         {
-                            waitPage.Hide();
-                            waitPage.RemoveFromParent();
+                            if (waitPage != null)
+                            {
+                                waitPage.RemoveFromParent();
+                                waitPage = null;
+                            }
                         });
                     }
                 })

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