ios - MVVM跨iOS : how to bind a command with Custom transition when switching to different View model

Question

对于 MVVMCross ios，如何使用不同的 TransitionalStyle(例如 FlipHorizo​​ntal 样式)而不是使用“ShowViewModel”的默认滑动效果？

[Register("SearchResults")]
public class SearchResultsView : MvxTableViewController
{
    public override void ViewDidLoad()
    {
        Title = "List";
        base.ViewDidLoad();

        var mapButton = new UIButton(new RectangleF(0, 0, 65, 30));
        mapButton.SetBackgroundImage(UIImage.FromBundle("images/map_btn.png"), UIControlState.Normal);
        mapButton.TouchUpInside += MapButtonClicked();
        var rightButton = new UIBarButtonItem(mapButton);
        NavigationItem.RightBarButtonItem = rightButton;

        var bindings = this.CreateBindingSet<SearchResultsView, SearchResultsViewModel>();
        //bindings.Bind(mapButton).To(x => x.ShowMapCommand); //how to do with binding command?
        bindings.Apply();
    }

    private EventHandler MapButtonClicked()
    {
        return (sender, args) =>
        {

            var mapView = new SearchResultMapView {ModalTransitionStyle = UIModalTransitionStyle.FlipHorizontal};
            var navigationController = new UINavigationController(mapView);
            PresentViewController(navigationController, true, null);
        };
    }
}

Answer 1

ViewModels/Views 使用 Presenter 呈现。

对于导航 Controller 的模态显示，有些人使用 MvxModalNavSupportTouchViewPresenter.cs

您可以通过覆盖设置中的 CreatePresenter 来使用此演示器:

    protected override IMvxTouchViewPresenter CreatePresenter()
    {
        return new MvxModalNavSupportTouchViewPresenter(ApplicationDelegate, Window);
    }

完成此操作后，您应该能够通过添加 IMvxModalTouchView 继承并在构造函数中为您的 设置 ModalTransitionStyle = UIModalTransitionStyle.FlipHorizo​​ntal; 来实现过渡效果>SearchResultMapView.

    public class SearchResultMapView 
         : MvxViewController, IMvxModalTouchView
    {
        public SearchResultMapView()
        {
            ModalTransitionStyle = UIModalTransitionStyle.FlipHorizontal;
        }

        // more code here....
    }

或者，如果您想完全自定义 View / View Controller 的呈现，那么实现自定义呈现器是相当简单的 - 有关更多信息，请参阅 http://slodge.blogspot.co.uk/2013/06/presenter-roundup.html 中有关自定义呈现器的一些文章和教程。