From 332cb15e6513bba5d0aafef711eda07daf8a75d3 Mon Sep 17 00:00:00 2001
From: uye <99072975+ABA2396@users.noreply.github.com>
Date: Sun, 20 Jul 2025 22:45:47 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=9F=A5=E7=9C=8B=E5=85=AC=E5=91=8A?=
 =?UTF-8?q?=E6=8C=89=E9=92=AE=E6=B7=BB=E5=8A=A0=E6=A3=80=E6=9F=A5=E6=97=B6?=
 =?UTF-8?q?=E7=A6=81=E7=94=A8?=
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Content-Type: text/plain; charset=UTF-8
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---
 .../ViewModels/UI/SettingsViewModel.cs        | 30 +++++++++++++++++--
 .../Settings/AboutUserControl.xaml            |  4 ++-
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs b/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs
index 70f985ce09..fdf7fc3523 100644
--- a/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs
+++ b/src/MaaWpfGui/ViewModels/UI/SettingsViewModel.cs
@@ -678,12 +678,38 @@ namespace MaaWpfGui.ViewModels.UI
             (sender as ComboBox)?.MakeComboBoxSearchable();
         }
 
+        private bool _isCheckingAnnouncement = false;
+
+        public bool IsCheckingAnnouncement
+        {
+            get => _isCheckingAnnouncement;
+            set
+            {
+                SetAndNotify(ref _isCheckingAnnouncement, value);
+            }
+        }
+
         // UI 绑定的方法
         [UsedImplicitly]
         public async Task CheckAndDownloadAnnouncement()
         {
-            await Instances.AnnouncementViewModel.CheckAndDownloadAnnouncement();
-            _ = Execute.OnUIThreadAsync(() => Instances.WindowManager.ShowWindow(Instances.AnnouncementViewModel));
+            if (IsCheckingAnnouncement)
+            {
+                return;
+            }
+
+            IsCheckingAnnouncement = true;
+
+            try
+            {
+                await Instances.AnnouncementViewModel.CheckAndDownloadAnnouncement();
+                await Execute.OnUIThreadAsync(() =>
+                    Instances.WindowManager.ShowWindow(Instances.AnnouncementViewModel));
+            }
+            finally
+            {
+                IsCheckingAnnouncement = false;
+            }
         }
 
         /// <summary>
diff --git a/src/MaaWpfGui/Views/UserControl/Settings/AboutUserControl.xaml b/src/MaaWpfGui/Views/UserControl/Settings/AboutUserControl.xaml
index cff3114f2a..30d0b08f02 100644
--- a/src/MaaWpfGui/Views/UserControl/Settings/AboutUserControl.xaml
+++ b/src/MaaWpfGui/Views/UserControl/Settings/AboutUserControl.xaml
@@ -2,6 +2,7 @@
     x:Class="MaaWpfGui.Views.UserControl.Settings.AboutUserControl"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:c="clr-namespace:CalcBinding;assembly=CalcBinding"
     xmlns:constants="clr-namespace:MaaWpfGui.Constants"
     xmlns:controls="clr-namespace:MaaWpfGui.Styles.Controls"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
@@ -59,7 +60,8 @@
                 Width="Auto"
                 Margin="5"
                 Command="{s:Action CheckAndDownloadAnnouncement}"
-                Content="{DynamicResource CheckAndDownloadAnnouncement}" />
+                Content="{DynamicResource CheckAndDownloadAnnouncement}"
+                IsEnabled="{c:Binding !IsCheckingAnnouncement}" />
         </StackPanel>
         <StackPanel Grid.Column="1">
             <controls:TextBlock