两个根演示文稿之间的MvvmCross v5动画

Question

我有两个由MvxRootPresentation属性标记的iOS视图:LoginView没有包装到导航控制器中并且MainView包装到导航控制器中.

当我打电话时ShowViewModel<MainViewModel>(),这两个视图之间没有动画.所有后续视图都像往常一样动画(在NavigationController中).

如何为此过渡设置动画？

Answer 1

好的,我自己做了:)我必须添加我的自定义演示文稿属性和自定义演示者:

public class AnimatedRootPresentationAttribute : MvxRootPresentationAttribute
{
}

public class MyPresenter : MvxIosViewPresenter
{
    public MyPresenter(IUIApplicationDelegate appDelegate, UIWindow window)
        : base(appDelegate, window)
    {
    }

    protected override void RegisterAttributeTypes()
    {
        base.RegisterAttributeTypes();

        _attributeTypesToShowMethodDictionary.Add(typeof(AnimatedRootPresentationAttribute),
            (viewController, attribute, request) => ShowAnimatedRootViewController(
                viewController, (AnimatedRootPresentationAttribute)attribute, request));
    }

    private void ShowAnimatedRootViewController(
        UIViewController viewController,
        AnimatedRootPresentationAttribute attribute,
        MvxViewModelRequest request)
    {
        ShowRootViewController(viewController, attribute, request);
        AddAnimation();
    }

    private void AddAnimation()
    {
        var transition = new CATransition
        {
            Duration = 0.2,
            Type = CAAnimation.TransitionMoveIn,
            Subtype = CAAnimation.TransitionFromTop
        };

        _window.RootViewController.View.Layer.AddAnimation(transition, null);
    }
}