MVVMCross Xamarin和故事板

Question

我试着用Xamarin'经典'MvvmCross。 我已经使用Android。

但我不能在iOS上工作。我已经看过这里提到的示例（EH）：MVVMCross support for Xamarin.iOS Storyboards

我真的很想念一些东西。 我有什么：

• 只有3个控件的故事板。一个标签和2个按钮。所有3 都有名字，所以我得到RootViewController类中的属性。
• 基础setup.cs

• AppDelegate.cs

  [Register("AppDelegate")] 
      public partial class AppDelegate : MvxApplicationDelegate 
      { 
  
  UIWindow _window; 
  
  public override bool FinishedLaunching(UIApplication app, NSDictionary options) 
  { 
      _window = new UIWindow(UIScreen.MainScreen.Bounds); 
  
      StoryBoardTouchViewPresenter sbPresenter = new StoryBoardTouchViewPresenter(this, _window, "MainStoryboard"); 
  
      var setup = new Setup(this, _window); 
      setup.Initialize(); 
  
      var startup = Mvx.Resolve<IMvxAppStart>(); 
      startup.Start(); 
  
      sbPresenter.MasterNavigationController.NavigationBar.Translucent = false; 
  
      sbPresenter.MasterNavigationController.SetNavigationBarHidden(false, false); 
  
      return true; 
  } 
  
  } 
  

StoryBoardTouchViewPresenter（从MVVMCross: Is it possible to use Storyboard with ICommand navigation?）但是，API被改变。

public class StoryBoardTouchViewPresenter : MvxTouchViewPresenter 
{ 
    public static UIStoryboard Storyboard = null; 


    public StoryBoardTouchViewPresenter(UIApplicationDelegate applicationDelegate, UIWindow window, string storyboardName, NSBundle StoryboardBundleOrNull = null) 
     : base(applicationDelegate, window) 
    { 
     Storyboard = UIStoryboard.FromName(storyboardName, StoryboardBundleOrNull); 
    } 

    public override void Show(IMvxTouchView view) 
    { 
     MvxViewController sbView = null; 

     try 
     { 
      sbView = (MvxViewController)Storyboard.InstantiateViewController(view.Request.ViewModelType.Name.Replace("Model", "")); 
     } 
     catch (Exception e) 
     { 
      Console.WriteLine("Failed to find storyboard view, did you forget to set the Storyboard ID to the ViewModel class name without the Model suffix ?" + e); 
     } 

     sbView.Request = view.Request; 

     base.Show(sbView); 
    } 

} 

的核心项目

public class App : Cirrious.MvvmCross.ViewModels.MvxApplication 
    { 
     public override void Initialize() 
     { 
      CreatableTypes() 
       .EndingWith("Service") 
       .AsInterfaces() 
       .RegisterAsLazySingleton(); 

      RegisterAppStart<ViewModels.MainViewModel>(); 
     } 
    } 

视图模型默认App.cs：

public class MainViewModel : MvxViewModel 
    { 
     ITodoTaskService taskService; 
     IDataManager<TodoTask> tasks; 

     public MainViewModel(ITodoTaskService taskService) 
     { 
      this.taskService = taskService; 
     } 

     public async override void Start() 
     { 
      this.tasks = new DataManager<TodoTask>(await this.taskService.GetTodoTasksAsync()); 
      this.tasks.MoveFirst(); 

      Rebind(); 
      base.Start(); 
     } 

     private void Rebind() 
     { 
      this.Description = this.tasks.Current.Description; 

      NextCommand.RaiseCanExecuteChanged(); 
      PreviousCommand.RaiseCanExecuteChanged(); 
     } 

     private string description; 

     public string Description 
     { 
      get { return this.description; } 
      set 
      { 
       this.description = value; 
       RaisePropertyChanged(() => Description); 
      } 
     } 

     private MvxCommand nextCommand; 
     public MvxCommand NextCommand 
     { 
      get 
      { 
       this.nextCommand = this.nextCommand ?? new MvxCommand(NavigateToNext, CanNavigateNext); 
       return this.nextCommand; 
      } 
     } 

     private bool CanNavigateNext() 
     { 
      return this.tasks.CanMoveNext; 
     } 

     public void NavigateToNext() 
     { 
      this.tasks.MoveNext(); 
      Rebind(); 
     } 

     private MvxCommand previousCommand; 
     public MvxCommand PreviousCommand 
     { 
      get 
      { 
       this.previousCommand = this.previousCommand ?? new MvxCommand(NavigateToPrevious, CanNavigatePrevious); 
       return this.previousCommand; 
      } 
     } 

     private bool CanNavigatePrevious() 
     { 
      return this.tasks.CanMovePrevious; 
     } 

     public void NavigateToPrevious() 
     { 
      this.tasks.MovePrevious(); 
      Rebind(); 
     } 
    } 

我尝试了所有类的东西。目前我收到的例外是MainView无法找到。我部分理解。在App.cs MainViewModel是启动。但控制器被称为RootViewController。我认为RootviewController应该绑定到我的MainViewModel。但我不知道如何。

我应该如何让MvvmCross与iOs一起工作？ 我应该如何命名这些零件？

Answer 1

MvvmCross的默认视图查找器将查找名为MainView的视图。该视图应该来自MvxViewController或另一种IMvxTouchView类型。如果你不想命名你的视图控制器“MainView”，那么你需要创建一个自定义视图解析器。

我的建议：只需将您的RootViewController重命名为MainView。