c# - C#控制台蛇在长按时卡住

Question

我几个月前才刚刚开始学习编程，然后决定做一个主机蛇游戏。一切都对一件事情充满期待。

如果我的蛇在向上移动，而我按下箭头并保持按下状态，那么我的蛇会停止并且即使在我停止按下按钮后仍保持停止状态。

如果我的蛇向右走，而我按向右箭头的时间太长，也会失去控制一段时间（但蛇不会停止），也会发生同样的事情。它发生在每个方向（左，右，上，下）。

我试图将cki与另一个ConsoleKeyInfo进行比较，但两者之间略有延迟，但这并不重要。如果我按住键，我的程序将停留在该位置并更新键。 （至少我认为这就是问题所在）

这是Console.ReadKey的“功能”，还是有某种方法可以解决此问题？

请记住，我刚刚开始，所以我还不了解高级知识。

只要我按住按键的时间不超过1秒钟，一切都会正常进行。

   public void LiikutaMato() //movesnake
    {

        if (Console.KeyAvailable)
        {
                ConsoleKeyInfo cki;
                cki = Console.ReadKey(true); // <-- I believe this is where it gets stuck 

    }

Answer 1

玩这个...它使用紧密循环来消耗按键，直到设置的延迟时间到期为止。您也不必按住键来保持蛇的运动。它对我的系统非常敏感：

class Program
{

    public enum Direction
    {
        Up, 
        Down, 
        Right, 
        Left
    }

    static void Main(string[] args)
    {
        const int delay = 75;
        string snake = "O";
        char border = 'X';

        int x, y;
        int length;
        bool crashed = false;
        Direction curDirection = Direction.Up;
        Dictionary<string, bool> eaten = new Dictionary<string, bool>();
        Console.CursorVisible = false;

        ConsoleKeyInfo cki;
        bool quit = false;
        while (!quit)
        {
            Console.Clear();
            Console.Title = "Use 'a', 's', 'd' and 'w' to steer.  Hit 'q' to quit.";

            // draw border around the console:
            string row = new String(border, Console.WindowWidth);
            Console.SetCursorPosition(0, 0);
            Console.Write(row);
            Console.SetCursorPosition(0, Console.WindowHeight - 2);
            Console.Write(row);
            for (int borderY = 0; borderY < Console.WindowHeight - 2; borderY++)
            {
                Console.SetCursorPosition(0, borderY);
                Console.Write(border.ToString());
                Console.SetCursorPosition(Console.WindowWidth - 1, borderY);
                Console.Write(border.ToString());
            }

            // reset all game variables:
            length = 1;
            crashed = false;
            curDirection = Direction.Up;
            eaten.Clear();
            x = Console.WindowWidth / 2;
            y = Console.WindowHeight / 2;
            eaten.Add(x.ToString("00") + y.ToString("00"), true);

            // draw new snake:
            Console.SetCursorPosition(x, y);
            Console.Write(snake);

            // wait for initial keypress:
            while (!Console.KeyAvailable)
            {
                System.Threading.Thread.Sleep(10);
            }

            // see if intitial direction should be changed:
            cki = Console.ReadKey(true);
            switch (cki.KeyChar)
            {
                case 'w':
                    curDirection = Direction.Up;
                    break;

                case 's':
                    curDirection = Direction.Down;
                    break;

                case 'a':
                    curDirection = Direction.Left;
                    break;

                case 'd':
                    curDirection = Direction.Right;
                    break;

                case 'q':
                    quit = true;
                    break;
            }

            // main game loop:
            DateTime nextCheck = DateTime.Now.AddMilliseconds(delay);
            while (!quit && !crashed)
            {
                Console.Title = "Length: " + length.ToString();

                // consume keystrokes and change current direction until the delay has expired:
                // *The snake won't actually move until after the delay!
                while (nextCheck > DateTime.Now)
                {
                    if (Console.KeyAvailable)
                    {
                        cki = Console.ReadKey(true);
                        switch (cki.KeyChar)
                        {
                            case 'w':
                                curDirection = Direction.Up;
                                break;

                            case 's':
                                curDirection = Direction.Down;
                                break;

                            case 'a':
                                curDirection = Direction.Left;
                                break;

                            case 'd':
                                curDirection = Direction.Right;
                                break;

                            case 'q':
                                quit = true;
                                break;
                        }
                    }
                }

                // if the user didn't quit, attempt to move without hitting the border:
                if (!quit)
                {
                    string key = "";
                    switch (curDirection)
                    {
                        case Direction.Up:
                            if (y > 1)
                            {
                                y--;
                            }
                            else
                            {
                                crashed = true;
                            }
                            break;

                        case Direction.Down:
                            if (y < Console.WindowHeight - 3)
                            {
                                y++;
                            }
                            else
                            {
                                crashed = true;
                            }
                            break;

                        case Direction.Left:
                            if (x > 1)
                            {
                                x--;
                            }
                            else
                            {
                                crashed = true;
                            }

                            break;

                        case Direction.Right:
                            if (x < Console.WindowWidth - 2)
                            {
                                x++;
                            }
                            else
                            {
                                crashed = true;
                            }
                            break;
                    }

                    // if the user didn't hit the border, see if they hit the snake
                    if (!crashed)
                    {
                        key = x.ToString("00") + y.ToString("00");
                        if (!eaten.ContainsKey(key))
                        {
                            length++;
                            eaten.Add(key, true);
                            Console.SetCursorPosition(x, y);
                            Console.Write(snake);
                        }
                        else
                        {
                            crashed = true;
                        }
                    }

                    // set the next delay:
                    nextCheck = DateTime.Now.AddMilliseconds(delay);
                }
            } // end main game loop

            if (crashed)
            {
                Console.Title = "*** Crashed! *** Length: " + length.ToString() + "     Hit 'q' to quit, or 'r' to retry!";

                // wait for quit or retry:
                bool retry = false;
                while (!quit && !retry)
                {
                    if (Console.KeyAvailable)
                    {
                        cki = Console.ReadKey(true);
                        switch (cki.KeyChar)
                        {
                            case 'q':
                                quit = true;
                                break;

                            case 'r':
                                retry = true;
                                break;
                        }
                    }
                }
            } 

        } // end main program loop

    } // end Main()

}