MVVM对Xamarin.iOS Storyboard的交叉支持 [英] MVVMCross support for Xamarin.iOS Storyboards

问题描述

由于支持即将制作稳定视频流的iOS故事板的XS集成，我希望能够将此功能与MVVMCross结合使用.

With support for XS integration of iOS storyboards about to make the Stable stream, I would love to be able to use this feature in conjunction with MVVMCross.

从根本上说，它似乎确实不应该工作，因为情节提要指示的是视图项目中的导航层次结构，而不是像MVVMCross这样的视图模型项目.

Fundamentally it does seem a little like it should not work, as with storyboards indicate navigational hierarchy in the view project, rather than a viewmodel project like MVVMCross.

但是，如果有一种方法可以使两者一起工作，那就太棒了.

But it would be awesome if there is a way to make the 2 work together.

有人知道如何实现吗?

特里斯坦干杯

推荐答案

至少发布了一个示例，演示了情节提要的使用-相当奇怪的eh-

There is at least one sample published showing the use of Storyboards - the rather oddly named eh - https://github.com/slodge/eh

此示例的工作人员:

• 让情节提要板控制导航
• 使用MvxViewController作为VC基类(代替UIViewController)
• 在一种情况下手动设置ViewModel-通过直接设置之前来调用base.ViewDidLoad()-请参见 https://github.com/slodge/eh/blob/master/storyb/RootViewController.cs#L40

• letting the Storyboard control the navigation
• using MvxViewController as a VC base class (in place of UIViewController)
• manually setting the ViewModel in one case - by setting it directly before calling base.ViewDidLoad() - see https://github.com/slodge/eh/blob/master/storyb/RootViewController.cs#L23
• manually setting the Request in one case - during the Segue navigation - see https://github.com/slodge/eh/blob/master/storyb/RootViewController.cs#L40

使用这样的方法，可以很容易地将Mvx数据绑定添加到主要由Storyboard驱动的应用程序中.

Using approaches like this it's pretty easy to add Mvx Data-Binding to an application that is primarily driven by the Storyboard.

或者，如果开发人员希望让Mvx ShowViewModel导航系统控制屏幕的流程-但也希望将这些屏幕设计在情节提要中，则可以通过开发普通的MvvmCross应用程序来实现，但可以使用一个自定义的Presenter，可以从情节提要中加载ViewController.

Alternatively, if developers would prefer to let the Mvx ShowViewModel navigation system control the flow of screens - but would also prefer those screens to be designed within a storyboard, then this is possible by developing a normal MvvmCross application, but using a custom Presenter which loads ViewControllers from the storyboard.

在MvvmCross v3.1.1中，您可以在ViewsContainer级别执行此操作:

In v3.1.1 of MvvmCross, you can do this at the ViewsContainer level:

• 覆盖MvxTouchViewsContainer.cs
中的类MyContainer
• 覆盖方法protected virtual IMvxTouchView CreateViewOfType(Type viewType, MvxViewModelRequest request)-请参见 https://github.com/MvvmCross/MvvmCross/blob/b8545752f28f4e569efeaa397c3085b0373e4d8b/Cirrious/Cirrious.MvvmCross.Touch/Views/MvxTouchViewsContainer.cs#L40

• 在此替代项中，加载基于情节提要的ViewController:

• override a class MyContainer from MvxTouchViewsContainer.cs
• override the method protected virtual IMvxTouchView CreateViewOfType(Type viewType, MvxViewModelRequest request) - see https://github.com/MvvmCross/MvvmCross/blob/b8545752f28f4e569efeaa397c3085b0373e4d8b/Cirrious/Cirrious.MvvmCross.Touch/Views/MvxTouchViewsContainer.cs#L40

• in this override, load your Storyboard-based ViewControllers:

 protected override IMvxTouchView CreateViewOfType(Type viewType, MvxViewModelRequest request)
 {
     return (IMvxTouchView)UIStoryboard.FromName("MyStoryBoard", null)
                                       .InstantiateViewController(viewType.Name);
 }

在Setup-

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

那应该可以正常工作...

that should just then work...

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