修复 Q&A 页面引发的内存泄漏

添加 调试模式中启动耗时监控

src/ST.Client.Desktop.Avalonia.App/App.axaml.cs

@@ -123,16 +123,31 @@ namespace System.Application.UI
 
         public override void Initialize()
         {
+#if DEBUG
+            StartTrace.Restart("App.Initialize");
+#endif
             AvaloniaXamlLoader.Load(this);
-
+#if DEBUG
+            StartTrace.Restart("App.LoadXAML");
+#endif
             Name = ThisAssembly.AssemblyTrademark;
             ViewModelBase.IsInDesignMode = ApplicationLifetime == null;
             if (ViewModelBase.IsInDesignMode) Startup.Init(DILevel.MainProcess);
-
+#if DEBUG
+            StartTrace.Restart("App.SetP");
+#endif
             var windowService = IWindowService.Instance;
             windowService.Init();
 
+#if DEBUG
+            StartTrace.Restart("WindowService.Init");
+#endif
+
             SettingsHost.Load();
+#if DEBUG
+            StartTrace.Restart("SettingsHost.Init");
+#endif
+
 #if !UI_DEMO
             if (GeneralSettings.IsStartupAppMinimized.Value)
             {
@@ -144,7 +159,9 @@ namespace System.Application.UI
             Theme = (AppTheme)UISettings.Theme.Value;
             UISettings.Theme.Subscribe(x => Theme = (AppTheme)x);
             UISettings.Language.Subscribe(x => R.ChangeLanguage(x));
-
+#if DEBUG
+            StartTrace.Restart("Theme + UISettings.Subscribe");
+#endif
             switch (windowService.MainWindow)
             {
                 case AchievementWindowViewModel window:
@@ -168,6 +185,9 @@ namespace System.Application.UI
                     };
                     break;
             }
+#if DEBUG
+            StartTrace.Restart("Set MainWindow");
+#endif
         }
 
         public ContextMenu? NotifyIconContextMenu { get; private set; }

src/ST.Client.Desktop.Avalonia.App/Program.cs

@@ -22,6 +22,9 @@ namespace System.Application.UI
         [STAThread]
         static int Main(string[] args)
         {
+#if DEBUG
+            StartTrace.Restart();
+#endif
             // 目前桌面端默认使用 SystemTextJson 如果出现兼容性问题可取消下面这行代码
             // Serializable.DefaultJsonImplType = Serializable.JsonImplType.NewtonsoftJson;
             IsMainProcess = args.Length == 0;
@@ -54,20 +57,34 @@ namespace System.Application.UI
                 }
                 else
                 {
-                    Startup.Init(DILevel.MainProcess);
+#if DEBUG
+                    StartTrace.Restart("ProcessCheck");
+#endif
 
+                    Startup.Init(IsMainProcess ? DILevel.MainProcess : DILevel.Min);
+#if DEBUG
+                    StartTrace.Restart("Startup.Init");
+#endif
                     if (IsMainProcess)
                     {
                         var appInstance = new ApplicationInstance();
                         if (!appInstance.IsFirst) goto exit;
                     }
-
+#if DEBUG
+                    StartTrace.Restart("ApplicationInstance");
+#endif
                     InitCefNetApp();
+#if DEBUG
+                    StartTrace.Restart("InitCefNetApp");
+#endif
 
                     if (IsMainProcess)
                     {
                         InitAvaloniaApp();
                     }
+#if DEBUG
+                    StartTrace.Restart("InitAvaloniaApp");
+#endif
                 }
             }
             catch (Exception ex)

src/ST.Client.Desktop.Avalonia.App/ST.Client.Desktop.Avalonia.App.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <OutputType>WinExe</OutputType>
+    <OutputType>Exe</OutputType>
     <TargetFramework>net5.0</TargetFramework>
     <SignAssembly>false</SignAssembly>
     <!--(SignAssembly)对此程序集进行签名会导致编译失败(CompileAvaloniaXamlTask)-->

src/ST.Client.Desktop.Avalonia.App/StartTrace.cs

@@ -0,0 +1,31 @@
+#if DEBUG
+using System.Diagnostics;
+using System.Linq;
+
+namespace System.Application.UI
+{
+    /// <summary>
+    /// 启动耗时跟踪
+    /// </summary>
+    static class StartTrace
+    {
+        static Stopwatch? sw;
+
+        public static void Restart(string? mark = null)
+        {
+            if (sw != null)
+            {
+                sw.Stop();
+                var msg = $"{string.Join(" ", Environment.GetCommandLineArgs().Skip(1).Take(1))}mark: {mark}, value: {sw.ElapsedMilliseconds}";
+                Debug.WriteLine(msg);
+                Console.WriteLine(msg);
+                sw.Restart();
+            }
+            else
+            {
+                sw = Stopwatch.StartNew();
+            }
+        }
+    }
+}
+#endif

src/ST.Client.Desktop.Avalonia.App/Views/MainWindow.axaml.cs

@@ -13,17 +13,10 @@ namespace System.Application.UI.Views
             InitializeComponent();
 #if DEBUG
             this.AttachDevTools();
+            StartTrace.Restart("MainWindow.ctor");
 #endif
         }
 
-        public MainWindow(IWindowImpl impl) : base(impl)
-        {
-            InitializeComponent();
-#if DEBUG
-            this.AttachDevTools();
-#endif 
-        }
-
         protected override void OnClosing(CancelEventArgs e)
         {
 #if !UI_DEMO

src/ST.Client.Desktop.Avalonia/Application/UI/Views/Pages/About/About_FAQPage.axaml.cs

@@ -1,4 +1,6 @@
+using Avalonia;
 using Avalonia.Controls;
+using Avalonia.LogicalTree;
 using Avalonia.Markup.Xaml;
 using CefNet;
 using CefNet.Avalonia;
@@ -28,28 +30,40 @@ namespace System.Application.UI.Views.Pages
             AvaloniaXamlLoader.Load(this);
         }
 
+        protected override void OnDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
+        {
+            base.OnDetachedFromLogicalTree(e);
+            Dispose();
+        }
+
+        protected override void OnDetachedFromVisualTree(VisualTreeAttachmentEventArgs e)
+        {
+            base.OnDetachedFromVisualTree(e);
+            Dispose();
+        }
+
         protected virtual void Dispose(bool disposing)
         {
             if (!disposedValue)
             {
                 if (disposing)
                 {
-                    // TODO: 释放托管状态(托管对象)
+                    // TODO: 释放托管状态(托管对象)
                     if (webViewQA != null)
                     {
                         ((IDisposable)webViewQA).Dispose();
                     }
                 }
 
-                // TODO: 释放未托管的资源(未托管的对象)并替代终结器
-                // TODO: 将大型字段设置为 null
+                // TODO: 释放未托管的资源(未托管的对象)并替代终结器
+                // TODO: 将大型字段设置为 null
                 disposedValue = true;
             }
         }
 
         public void Dispose()
         {
-            // 不要更改此代码。请将清理代码放入“Dispose(bool disposing)”方法中
+            // 不要更改此代码。请将清理代码放入“Dispose(bool disposing)”方法中
             Dispose(disposing: true);
             GC.SuppressFinalize(this);
         }