使用自定义演示者时 IMvxTouchModalHost 无法解析答案

【问题标题】：IMvxTouchModalHost not resolvable when using custom presenter使用自定义演示者时 IMvxTouchModalHost 无法解析
【发布时间】：2015-11-19 18:34:16
【问题描述】：

我创建了一个需要引用我的自定义演示者的自定义服务，但在解析 IMvxTouchModalHost 时出现错误。通过使用默认的 MvxTouchViewPresenter，一切正常。

这是我的代码：

AppDelegate.cs

    public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    {
        this.window = new UIWindow(UIScreen.MainScreen.Bounds);

        var presenter = new AppViewPresenter(this, this.window);

        var setup = new Setup(this, presenter);
        setup.Initialize();

        Mvx.Resolve<IMvxAppStart>().Start();

        this.window.MakeKeyAndVisible();
    }

AppViewPresenter.cs

public class AppViewPresenter : MvxTouchViewPresenter
{
    private IMvxTouchViewCreator viewCreator;
    protected IMvxTouchViewCreator ViewCreator
    {
        get { return this.viewCreator ?? (this.viewCreator = Mvx.Resolve<IMvxTouchViewCreator>()); }
    }

    public AppViewPresenter(IUIApplicationDelegate applicationDelegate, UIWindow window)
        : base(applicationDelegate, window)
    {
    }

    protected override void OnMasterNavigationControllerCreated()
    {
        this.MasterNavigationController.WeakDelegate = new NavigationControllerDelegate();
    }

    public override void Show(MvxViewModelRequest request)
    {
        var nextViewController = (UIViewController)this.ViewCreator.CreateView(request);
        if (nextViewController is IMvxModalTouchView)
        {
            nextViewController.TransitioningDelegate = new NavigationControllerTransitioningDelegate();
            nextViewController.ModalPresentationStyle = UIModalPresentationStyle.Custom;
            this.CurrentTopViewController.PresentViewController(nextViewController, true, null);
        }
        else
        {
            base.Show(request);
        }

        if (request.PresentationValues != null)
        {
            if (request.PresentationValues.ContainsKey("ClearStack") && this.CurrentTopViewController != null)
            {
                if (this.CurrentTopViewController.GetType() != nextViewController.GetType())
                {
                    this.MasterNavigationController.PopToRootViewController(true);
                }
            }
        }
    }

    public override void Close(IMvxViewModel toClose)
    {
        if (this.CurrentTopViewController.PresentedViewController != null)
        {
            this.CurrentTopViewController.DismissModalViewController(true);
        }
        else
        {
            base.Close(toClose);
        }
    }
}

Setup.cs

public class Setup : MvxTouchSetup
{
    public Setup(MvxApplicationDelegate appDelegate, IMvxTouchViewPresenter presenter)
        : base(appDelegate, presenter)
    {
    }

    protected override IMvxApplication CreateApp()
    {
        return new App.Core.Infrastructure.App();
    }

    protected override IMvxTouchViewsContainer CreateTouchViewsContainer()
    {
        return new AppViewContainer();
    }

    protected override void FillTargetFactories(IMvxTargetBindingFactoryRegistry registry)
    {
        base.FillTargetFactories(registry);

        registry.RegisterPropertyInfoBindingFactory(typeof(MvxUIPageControlCurrentPageTargetBinding), typeof(UIPageControl),
                                           "CurrentPage");


    }
}

CustomService.cs

public class CustomService : BaseService, ICustomService
{
    private readonly IMvxTouchModalHost modalHost;

    public CustomService()
    {
        this.modalHost = Mvx.Resolve<IMvxTouchModalHost>();
    }
}

CustomService 的 ctor 中抛出异常：

Cirrious.CrossCore.Exceptions.MvxIoCResolveException: Failed to resolve parameter for parameter window of type UIWindow when creating App.Infrastructure.AppViewPresenter

  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer.GetIoCParameterValues (System.Type type, System.Reflection.ConstructorInfo firstConstructor) [0x0006e] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer.IoCConstruct (System.Type type) [0x00031] in <filename unknown>:0 
  at Cirrious.CrossCore.Mvx.IocConstruct (System.Type t) [0x00006] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxLazySingletonCreator.get_Instance () [0x00020] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxTypeExtensions+<>c__DisplayClass49.<RegisterAsLazySingleton>b__48 () [0x00000] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer+ConstructingSingletonResolver.Resolve () [0x00028] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer.InternalTryResolve (System.Type type, IResolver resolver, System.Object& resolved) [0x00042] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer.InternalTryResolve (System.Type type, Nullable1 requiredResolverType, System.Object& resolved) [0x0002e] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer.InternalTryResolve (System.Type type, System.Object& resolved) [0x00000] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer.Resolve (System.Type t) [0x00011] in <filename unknown>:0 
  at Cirrious.CrossCore.IoC.MvxSimpleIoCContainer.Resolve[T] () [0x00000] in <filename unknown>:0 
  at Cirrious.CrossCore.Mvx.Resolve[TService] () [0x00006] in <filename unknown>:0 
  at App.Services.CustomService..ctor () [0x00009] in c:\Src\App\iPhone\Services\CustomService.cs:24

【问题讨论】：

能否格式化异常并为其添加调用堆栈？
很抱歉，这个调用堆栈对我来说毫无意义，而且创建 CustomService 的人也不明显......你确定你的代码没有在某些地方向 IoC 注册 IMvxTouchModalHost时髦的方式？
我确定。如果我切换到 MvxTouchViewPresenter 并且不更改其他内容，一切都很好。 CustomService 仅通过 Mvx.Resolve() 构造
并且：IMvxTouchModalHost只有一种用法：Mvx.Resolve() in ctor of CustomService
Setup.cs 是什么样的？它会做一些时髦的自动注册吗？（或者还有什么其他方法可以在包含您的 Presenter 的程序集中进行一些自动注册？）

标签： ios mvvmcross

【解决方案1】：

知道了。我在服务注册中不小心删除了 .EndingWith("Service") 。因此，在 App.cs 中当然必须有任何注册过滤器。否则它会重新注册所有内容。所以，从

更改注册

this.CreatableTypes().AsInterfaces().RegisterAsLazySingleton();

例如

this.CreatableTypes().EndingWith("Service").AsInterfaces().RegisterAsLazySingleton();

解决了。

【讨论】：