c# - 在 Xamarin Shell 中的标签栏页面之间滑动

Question

我使用底部菜单并禁用弹出窗口。对于 IOS，我需要向 shell 添加滑动手势。我使用了自定义渲染。

如何添加滑动动画？在用于标签页的 Android 上，它开箱即用。对于 Xamarin Shell 选项卡栏菜单，我需要类似的东西。我认为 Xamarin Forms 很容易使用，没有任何问题。这是应该实施的基本事情

[assembly: ExportRenderer(typeof(AppShell), typeof(CustomShellRenderer))]
namespace ShellDemo.iOS
{
    public class CustomShellRenderer : ShellRenderer
    {
        protected override IShellTabBarAppearanceTracker CreateTabBarAppearanceTracker()
        {
            return new CustomTabbarAppearance();
        }
    }

    public class CustomTabbarAppearance : IShellTabBarAppearanceTracker
    {
        public void Dispose()
        {

        }

        public void ResetAppearance(UITabBarController controller)
        {

        }

        public void SetAppearance(UITabBarController controller, ShellAppearance appearance)
        {
            UISwipeGestureRecognizer swipeRight = new UISwipeGestureRecognizer((gesture) =>
            {
                if (controller.SelectedIndex > 0)
                {
                    controller.SelectedIndex--;
                }
            });
            swipeRight.Direction = UISwipeGestureRecognizerDirection.Right;
            controller.View.AddGestureRecognizer(swipeRight);

            UISwipeGestureRecognizer swipeLeft = new UISwipeGestureRecognizer((gesture) =>
            {
                if (controller.SelectedIndex < controller.ViewControllers.Count() - 1)
                {
                    controller.SelectedIndex++;
                }
            });
            swipeLeft.Direction = UISwipeGestureRecognizerDirection.Left;
            controller.View.AddGestureRecognizer(swipeLeft);
        }

        public void UpdateLayout(UITabBarController controller)
        {

        }
    }
}```
![enter image description here](https://i.stack.imgur.com/dXNMJ.gif)