通过viewmodel找到view

如何通过viewmodel找到view？

之前的做法是，在view加载时（Loaded），将view保存到viewmodel中，后来想想Caliburn-Micro，自带方法可以通过viewmodel找到view，但是在网上搜索一番，无果。但是后来仔细想想，除非在viewmodel和view之间建立关系，否则是是找不到的。大部分viewmodel是作为对应的view的datacontext。要找到view，难道遍历可视化树，比对datacontex？显然是不行的，wpf不提供，Caliburn-Micro是否在绑定viewmodel是否做了手脚？看到以下的代码：

public static Action<object, DependencyObject, object> Bind = (viewModel, view, context) => {
            if ((bool)view.GetValue(noContext)) {
                Action.SetTargetWithoutContext(view, viewModel);
            }
            else {
                Action.SetTarget(view, viewModel);
            }

            var viewAware = viewModel as IViewAware;
            if (viewAware != null) {
                Log.Info("Attaching {0} to {1}.", view, viewAware);
                viewAware.AttachView(view, context);
            }

            if ((bool)view.GetValue(ConventionsAppliedProperty)) {
                return;
            }

            var element = View.GetFirstNonGeneratedView(view) as FrameworkElement;
            if (element == null) {
                return;
};

___var viewAware = viewModel as IViewAware;
if (viewAware != null) {
Log.Info("Attaching {0} to {1}.", view, viewAware);
viewAware.AttachView(view, context);
}

---

namespace Caliburn.Micro {
    using System;
    /// <summary>
    /// Denotes a class which is aware of its view(s).
    /// </summary>
    public interface IViewAware {
        /// <summary>
        /// Attaches a view to this instance.
        /// </summary>
        /// <param name="view">The view.</param>
        /// <param name="context">The context in which the view appears.</param>
        void AttachView(object view, object context = null);

        /// <summary>
        /// Gets a view previously attached to this instance.
        /// </summary>
        /// <param name="context">The context denoting which view to retrieve.</param>
        /// <returns>The view.</returns>
        object GetView(object context = null);

        /// <summary>
        /// Raised when a view is attached.
        /// </summary>
        event EventHandler<ViewAttachedEventArgs> ViewAttached;
    }
}

所以只要viewmodel实现IViewAware接口就可以。