问使用PRISM导航时，在自己的RegionAdapter中获取视图

EN

_regionManager.RequestNavigate("ContentRegion", uri);

Container.RegisterTypeForNavigation<ViewA>("ViewA");
Container.RegisterTypeForNavigation<ViewB>("ViewB");

protected override void Adapt(IRegion region, DockingManager regionTarget)
    {
        region.Views.CollectionChanged += delegate
        {
            foreach (var child in region.Views.Cast<UserControl>())
            {
                if (!regionTarget.Children.Contains(child))

                {
                    regionTarget.BeginInit();
                    regionTarget.Children.Add(child);
                    regionTarget.EndInit();
                }
            }
        };
        regionTarget.WindowClosing += delegate (object sender, WindowClosingEventArgs args)
        {
            var child = args.TargetItem as UserControl;
            region.Remove(child);
        };
        regionTarget.CloseButtonClick += delegate (object sender, CloseButtonEventArgs args) 
        {
            var child = args.TargetItem as UserControl;
            region.Remove(child);
        };

        region.NavigationService.Navigated += RegionTarget_Navigated;        
    }
private void RegionTarget_Navigated(object sender, RegionNavigationEventArgs e)
    {

    }