如何在Xamarin.Mac中捕获应用程序级别的按键事件

using AppKit;
using Foundation;

namespace XamarinMacApp
{
    [Register("AppDelegate")]
    public class AppDelegate : NSApplicationDelegate
    {
        public override void DidFinishLaunching(NSNotification notification)
        {
            // 订阅按键事件
            NSApplication.SharedApplication.KeyDown += HandleKeyDown;
        }

        private void HandleKeyDown(object sender, NSEvent e)
        {
            // 检查事件类型是否为按键事件
            if (e.Type == NSEventType.KeyDown)
            {
                // 获取按下的按键码
                var keyCode = e.KeyCode;

                // 执行相应的操作
                switch (keyCode)
                {
                    case (ushort)NSKey.Space:
                        // 按下了空格键
                        break;
                    case (ushort)NSKey.Enter:
                        // 按下了回车键
                        break;
                    // 添加其他按键的处理逻辑
                }
            }
        }
    }

    static class MainClass
    {
        static void Main(string[] args)
        {
            NSApplication.Init();
            NSApplication.SharedApplication.Delegate = new AppDelegate();
            NSApplication.Main(args);
        }
    }
}