如何在MvvmCross中指定要作为模式推送的视图? [英] How do I specify a view to be pushed as Modal in MvvmCross?

问题描述

我在使用MvvmCross框架的MonoTouch应用程序中有一个视图，希望显示模态(NavigationController.PresentModalViewController).

I have a view in a MonoTouch app using MvvmCross framework that I would like displayed Modal (NavigationController.PresentModalViewController).

推荐答案

MvvmCross的前提是所有ViewModels都是普通页面"-因此在iOS/MonoTouch中，这意味着使用UINavigationController呈现的UIViewControllers.

MvvmCross starts from the premise that all ViewModels are just "normal pages" - so in iOS/MonoTouch that means UIViewControllers presented using a UINavigationController.

要离开此前提-转到选项卡式显示，模式显示，拆分控制器，弹出窗口等-然后可以在MonoTouch应用程序中调整Presenter逻辑.

To move away from this premise - towards tabbed displays, modal displays, split controllers, popups, etc - then you can adjust the Presenter logic within your MonoTouch app.

演示者的工作是实施:

public interface IMvxTouchViewPresenter
{
    void Show(MvxShowViewModelRequest view);
    void Close(IMvxViewModel viewModel);
    void CloseModalViewController();
    void ClearBackStack();
    bool PresentModalViewController(UIViewController controller, bool animated);
    void NativeModalViewControllerDisappearedOnItsOwn();
}

在AppDelegate构造中选择了用于您的应用的演示者-例如看看 TwitterSearch 为iPhone和iPad构建不同的演示者.

The presenter used for your app is selected in AppDelegate construction - e.g. see how the TwitterSearch builds different presenters for iPhone and iPad.

幸运的是，对于简单的Modal支持，可用的标准演示者之一是

Fortunately, for simple Modal support, one of the standard presenters available is MvxModalSupportTouchViewPresenter.cs

此演示者希望查看所呈现的视图是否具有IMvxModalTouchView标记界面-它测试view is IMvxModalTouchView.如果存在此界面，那么它将对视图使用模式表示，而不是常规导航".

This presenter looks to see if the view being presented has the IMvxModalTouchView marker interface - it tests view is IMvxModalTouchView. If this interface is present, then it uses modal presentation for the view instead of "normal navigation".

要使用此功能，请将您的AppDelegate代码更改为以下内容:

To use this, change your AppDelegate code to something:

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

        // initialize app for single screen iPhone display
        var presenter = new MvxModalSupportTouchViewPresenter(this, window);
        var setup = new Setup(this, presenter);
        setup.Initialize();

        // start the app
        var start = this.GetService<IMvxStartNavigation>();
        start.Start();

        window.MakeKeyAndVisible();

        return true;
    } 

然后将标记界面添加到您的模式视图中:

Then add the marker interface to your modal View(s):

 public class MyView : MvxBindingTouchViewController<MyViewModel>, IMvxModalTouchView
 {
      // ....
 }

这篇关于如何在MvvmCross中指定要作为模式推送的视图?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！