在 mvvmcross 中显示来自非视图/视图模型的视图 [英] Show view from non-view/viewmodel in mvvmcross

问题描述

从非视图在 mvvmcross 中打开视图的正确方法是什么?在视图模型中，我们将使用 ShowViewModel<>(..).

What is the correct way to open a View in mvvmcross from a non-view? From within a viewmodel we would use ShowViewModel<>(..).

具体来说，我们正在响应打开应用程序(带有自定义负载)的推送通知，该通知指示应加载的视图.

Specifically we are responding to a push notification opening the app (with a custom payload) which dictates a view that should be loaded.

我们有一个 hackety 解决方法只是为了概念证明，只是想了解正确的 MVX 方法

We have a hackety workaround just for proof of concept, just wanted to get an idea of the correct MVX approach

推荐答案

我认为没有正确的方法" - 我认为这取决于您的应用以及您需要它做什么.

I don't think there is a 'correct way' - I think it depends on your app and what you need it to do.

对于某些特定情况 - 例如ViewModel->ViewModel 和 AppStart - MvvmCross 提供了一些方便的方法:

For some specific cases - e.g. ViewModel->ViewModel and AppStart - MvvmCross provides some convenient methods:

• 你可以在MvxViewModel中调用ShowViewModel
• 可以覆盖应用程序启动以使用提示对象 - 参见 https://speakerdeck.com/crillous/appstart-在-mvvmcross

但总的来说，任何类都可以通过调用:

But overall, any class can request a ShowViewModel by calling:

         var viewDispatcher = Mvx.Resolve<IMvxViewDispatcher>();
         viewDispatcher.ShowViewModel(new MvxViewModelRequest(
                                                    viewModelType,
                                                    parameterBundle,
                                                    presentationBundle,
                                                    requestedBy));

此外，还有一个基类 - MvxNavigatingObject.cs - 这可以帮助解决这个问题(它是 MvxViewModel 和 MvxAppStart 的基类) - 因此您可以轻松提供一个或多个服务，例如 INavigateMyselfService，其实现继承自 MvxNavigatingObject.

Further, there is a base class - MvxNavigatingObject.cs - which can help with this (it's a base class of MvxViewModel and MvxAppStart) - so you can easily provide one or more services like INavigateMyselfService who's implementations inherit from MvxNavigatingObject.

  public interface INavigateMyselfService
  {
      void GoWild(string side);
  }

  public class NavigateMyselfService
     : MvxNavigatingObject
     , INavigateMyselfService
  {
      public void GoWild(string side)
      {
          ShowViewModel<WildViewModel>(new { side = side });
      }
  }

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