MvvmCross - 如何添加自定义模态转换答案

【问题标题】：MvvmCross - How to Add Custom Modal TransitionMvvmCross - 如何添加自定义模态转换
【发布时间】：2018-09-06 03:23:35
【问题描述】：

我正在使用 MvvmCross 和 Xamarin 开发一个项目。我试图在呈现和关闭我的模态视图时添加自定义过渡。目前我是这样介绍的：

[MvxModalPresentation(WrapInNavigationController = true, ModalPresentationStyle = UIModalPresentationStyle.Custom)]
public partial class MyView : MvxViewController
{

并以这种方式解雇它：

NavigationController.DismissModalViewController(true);

所以我已经准备好我的动画，但我假设我需要将转换委托设置为我创建的那个。我该怎么做？

我对 MvvmCross 还很陌生，因此非常感谢任何提示和技巧。谢谢！

【问题讨论】：

标签： c# ios xamarin mvvm mvvmcross

【解决方案1】：

我不确定，你真正想要在这里实现什么。

如果您正在寻找语法帮助。应该是这样的。

this.NavigationController.TransitioningDelegate = new MyOwnDelegate();


  internal class MyOwnDelegate : IUIViewControllerTransitioningDelegate
    {
        public IntPtr Handle => throw new NotImplementedException();

        public void Dispose()
        {
            //throw new NotImplementedException();
        }
    }

但通常人们使用，这个。如果有帮助，我也会给出一些语法

this.NavigationController.Delegate = new NavigationControllerDelegate();



 public class NavigationControllerDelegate : UINavigationControllerDelegate
{
    public NavigationControllerDelegate(IntPtr handle) : base(handle)
    {
    }
    public NavigationControllerDelegate()
    {
    }
    public override IUIViewControllerAnimatedTransitioning GetAnimationControllerForOperation(UINavigationController navigationController, UINavigationControllerOperation operation, UIViewController fromViewController, UIViewController toViewController)
    {
        var fromVcConformA = fromViewController as ICustomTransition;
        var fromVCConFromB = fromViewController as IWaterFallViewControllerProtocol;
        var fromVCCConformc = fromViewController as IHorizontalPageViewControllerProtocol;

        var toVcConformA = toViewController as ICustomTransition;
        var toVCConfromB = toViewController as IWaterFallViewControllerProtocol;
        var toVCCConformc = toViewController as IHorizontalPageViewControllerProtocol;

        if ((fromVcConformA != null) && (toVcConformA != null) && ((fromVCConFromB != null && toVCCConformc != null) || (fromVCCConformc != null && toVCConfromB != null)))
        {
            var transition = new CustomTransition();
            transition.presenting = operation == UINavigationControllerOperation.Pop;
            return transition;
        }
        else
        {
            return null;
        }
    }

}

【讨论】：

我相信你已经回答了，但为了澄清，我问的是如何将转换委托应用于我的视图。我已经创建了一个委托和转换。
感谢您的澄清，如果回答解决了问题，请采纳。