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# ReactiveUI 架构检查报告 |
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## 📋 检查日期 |
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2025年1月(当前时间) |
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## ✅ 符合 ReactiveUI 最佳实践的项目 |
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### 1. ViewModels 继承结构 ✅ |
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- **MainWindowViewModel**: 正确继承 `ReactiveObject` ✅ |
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- **RoutableViewModel**: 正确继承 `ReactiveObject` 并实现 `IRoutableViewModel` ✅ |
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- **所有页面 ViewModel**: 正确继承 `RoutableViewModel` ✅ |
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- DashboardPageViewModel ✅ |
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- UsersPageViewModel ✅ |
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- SettingsPageViewModel ✅ |
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- ReportsPageViewModel ✅ |
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- HelpPageViewModel ✅ |
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- DialogHostPageViewModel ✅ |
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- IconsPageViewModel ✅ |
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- EditorPageViewModel ✅ |
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### 2. Views 继承结构 ✅ |
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- **MainWindow**: 正确继承 `ReactiveWindow<AppViewModel>` ✅ |
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- **所有页面 View**: 正确继承 `ReactiveUserControl<ViewModel>` ✅ |
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- DashboardPageView ✅ |
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- UsersPageView ✅ |
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- SettingsPageView ✅ |
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- ReportsPageView ✅ |
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- HelpPageView ✅ |
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- DialogHostPageView ✅ |
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- IconsPageView ✅ |
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- EditorPageView ✅ |
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### 3. 响应式属性通知 ✅ |
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所有 ViewModels 都正确使用 `RaiseAndSetIfChanged` 进行属性变更通知: |
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```csharp |
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public string Title |
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{ |
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get => _title; |
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set => this.RaiseAndSetIfChanged(ref _title, value); |
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} |
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``` |
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### 4. IScreen 和 RoutingState 使用 ✅ |
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- **AppViewModel**: 正确实现 `IScreen` 接口,提供 `RoutingState` ✅ |
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- **MainWindowViewModel**: 正确使用 `IScreen` 进行路由导航 ✅ |
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- **路由导航**: 使用 `Router.Navigate.Execute(viewModel)` 进行导航 ✅ |
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### 5. ReactiveCommand 使用 ✅ |
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- **MainWindowViewModel**: 正确使用 `ReactiveCommand` 创建命令 ✅ |
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- NavigateCommand ✅ |
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- CloseTabCommand ✅ |
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- SelectTabCommand ✅ |
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- **其他 ViewModels**: 也正确使用 ReactiveCommand ✅ |
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### 6. 响应式编程模式 ✅ |
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正确使用 `WhenAnyValue` 监听属性变化: |
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```csharp |
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this.WhenAnyValue(x => x.SelectedNavigationItem) |
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.Where(item => item != null) |
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.Subscribe(item => ...); |
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``` |
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### 7. ViewLocator 实现 ✅ |
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- **自定义 ViewLocator**: 正确实现 `IViewLocator` 接口 ✅ |
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- **命名约定**: 遵循 ViewModel/View 命名约定 ✅ |
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- **注册**: 在 App 初始化时正确注册到 Splat ✅ |
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### 8. 路由系统集成 ✅ |
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- **RoutedViewHost**: MainWindow.axaml 正确使用 `<reactive:RoutedViewHost Router="{Binding Router}"/>` ✅ |
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- **路由状态监听**: 正确监听 `Router.CurrentViewModel` 变化 ✅ |
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### 9. 依赖注入配置 ✅ |
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- **ReactiveUI 服务注册**: 正确注册 IScreen 和 ViewModel ✅ |
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- **服务生命周期**: 使用适当的生命周期(Singleton/Transient) ✅ |
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### 10. XAML 绑定 ✅ |
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- **ReactiveWindow/ReactiveUserControl**: 所有 XAML 文件正确使用 reactive 命名空间 ✅ |
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- **绑定语法**: 使用标准的 Avalonia 绑定语法 ✅ |
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- **命令绑定**: 正确绑定 ReactiveCommand ✅ |
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## ⚠️ 潜在问题和建议 |
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### 1. MainWindow ViewModel 设置不一致 ⚠️ |
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**问题描述**: |
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```csharp |
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// MainWindow.axaml.cs |
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public partial class MainWindow : ReactiveWindow<AppViewModel> |
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{ |
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public MainWindow(AppViewModel appViewModel, ...) |
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{ |
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ViewModel = appViewModel; // ✅ 正确 |
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DataContext = appViewModel.MainWindowViewModel; // ⚠️ 这里设置了 DataContext |
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} |
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} |
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``` |
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**分析**: |
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- `ReactiveWindow<AppViewModel>` 的 `ViewModel` 属性应该是 `AppViewModel` ✅ |
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- 但是 `DataContext` 被设置为 `MainWindowViewModel` |
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- 在 XAML 中,绑定会使用 `DataContext`(MainWindowViewModel),这可以正常工作 |
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- 但 ReactiveUI 的最佳实践是:如果使用 `ReactiveWindow<AppViewModel>`,应该通过 `ViewModel.MainWindowViewModel.Router` 来访问 Router |
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**当前绑定**: |
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```xml |
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<reactive:RoutedViewHost Router="{Binding Router}"/> |
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``` |
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这个绑定会从 `DataContext`(MainWindowViewModel)获取 Router,可以正常工作。 |
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**建议**: |
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1. **选项 1**(推荐): 如果 MainWindow 的主要功能都在 MainWindowViewModel 中,建议改为: |
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```csharp |
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public partial class MainWindow : ReactiveWindow<MainWindowViewModel> |
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{ |
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public MainWindow(MainWindowViewModel viewModel, ...) |
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{ |
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ViewModel = viewModel; |
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// 不需要单独设置 DataContext |
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} |
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} |
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``` |
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这样更符合 ReactiveUI 的设计模式。 |
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2. **选项 2**: 保持当前结构,但明确绑定路径: |
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```xml |
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<reactive:RoutedViewHost Router="{Binding ViewModel.MainWindowViewModel.Router}"/> |
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``` |
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然后将 MainWindow.axaml 的绑定改为从 ViewModel.MainWindowViewModel 获取。 |
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### 2. ViewLocator 使用 Activator.CreateInstance ⚠️ |
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**当前实现**: |
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```csharp |
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var view = Activator.CreateInstance(viewType) as IViewFor; |
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``` |
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**问题**: |
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- 没有使用依赖注入创建 View 实例 |
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- 如果 View 的构造函数需要参数,会失败 |
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**建议**: |
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如果项目使用依赖注入,可以考虑从 DI 容器获取 View 实例: |
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```csharp |
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// 从 ServiceProvider 获取 View(如果已注册) |
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var serviceProvider = Locator.Current.GetService<IServiceProvider>(); |
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if (serviceProvider != null) |
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{ |
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view = serviceProvider.GetService(viewType) as IViewFor; |
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} |
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// 如果 DI 中没有,再使用 Activator |
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if (view == null) |
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{ |
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view = Activator.CreateInstance(viewType) as IViewFor; |
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} |
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``` |
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### 3. ReactiveCommand 的异步支持 💡 |
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**当前实现**: |
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```csharp |
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NavigateCommand = ReactiveCommand.Create<NavigationItem>(NavigateToPage); |
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``` |
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**建议**: |
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如果命令需要异步操作或验证,可以使用: |
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```csharp |
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NavigateCommand = ReactiveCommand.CreateFromTask<NavigationItem>(async item => |
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{ |
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await NavigateToPageAsync(item); |
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}); |
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``` |
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### 4. 订阅的清理 💡 |
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**当前实现**: |
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```csharp |
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_screen.Router |
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.CurrentViewModel |
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.Subscribe(viewModel => { ... }); |
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``` |
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**建议**: |
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使用 `WhenActivated` 确保订阅在视图激活时创建,在停用时清理: |
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```csharp |
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this.WhenActivated(disposables => |
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{ |
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_screen.Router |
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.CurrentViewModel |
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.Subscribe(viewModel => { ... }) |
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.DisposeWith(disposables); |
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}); |
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``` |
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但这需要在 View 中实现 `IActivatableView` 接口。 |
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## 📊 总体评分 |
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| 检查项 | 状态 | 评分 | |
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|--------|------|------| |
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| ViewModels 继承结构 | ✅ | 10/10 | |
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| Views 继承结构 | ✅ | 10/10 | |
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| 响应式属性通知 | ✅ | 10/10 | |
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| IScreen/RoutingState | ✅ | 9/10 | |
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| ReactiveCommand | ✅ | 9/10 | |
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| 响应式编程模式 | ✅ | 8/10 | |
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| ViewLocator | ✅ | 8/10 | |
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| 路由系统集成 | ✅ | 9/10 | |
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| 依赖注入配置 | ✅ | 9/10 | |
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| XAML 绑定 | ✅ | 10/10 | |
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**总体评分**: **9.0/10** ⭐⭐⭐⭐⭐ |
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## 🎯 结论 |
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项目**基本完全遵循 ReactiveUI 最佳实践**,架构设计良好。主要符合点: |
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1. ✅ 正确的继承结构(ReactiveObject, ReactiveUserControl, ReactiveWindow) |
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2. ✅ 完整的路由系统集成(IScreen, RoutingState, RoutedViewHost) |
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3. ✅ 响应式编程模式(RaiseAndSetIfChanged, ReactiveCommand, WhenAnyValue) |
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4. ✅ 自定义 ViewLocator 实现 |
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5. ✅ 完整的依赖注入集成 |
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**主要建议**: |
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1. 考虑统一 MainWindow 的 ViewModel 设置(选项 1 更推荐) |
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2. 改进 ViewLocator 以支持依赖注入 |
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3. 考虑使用 `WhenActivated` 进行订阅管理 |
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## 📝 最佳实践检查清单 |
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- [x] ViewModels 继承 ReactiveObject |
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- [x] 路由 ViewModels 实现 IRoutableViewModel |
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- [x] Views 继承 ReactiveUserControl 或 ReactiveWindow |
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- [x] 使用 RaiseAndSetIfChanged 进行属性通知 |
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- [x] 使用 ReactiveCommand 创建命令 |
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- [x] 使用 IScreen 和 RoutingState 进行路由 |
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- [x] 使用 RoutedViewHost 显示路由内容 |
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- [x] 实现自定义 ViewLocator |
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- [x] 正确注册 ReactiveUI 服务 |
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- [x] 使用响应式编程模式(WhenAnyValue 等) |
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- [ ] 使用 WhenActivated 管理订阅(可选) |
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- [ ] ViewLocator 支持依赖注入(可选) |
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--- |
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**检查完成日期**: 2025年1月 |
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**检查工具**: AI 代码分析 |
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