c# - 时间跨度逻辑错误

Question

我的逻辑有误，我无法弄清楚它是什么。基本上，我连续计算游戏循环每次迭代的时间跨度，并将该持续时间添加到它之前的持续时间。我正在尝试计算玩游戏的总时间。当然，它不会产生正确的结果。我究竟做错了什么？非常感谢任何指导。

        private TimeSpan totalDuration = TimeSpan.FromSeconds(1);
        private int score = 0;

        public void Stop()
        {
            IsGameOver = true;
            //MessageBox.Show(String.Format("Game Over\n\nScore = {0}", score));
            MessageBox.Show(String.Format("Game Over\n\nScore = {0}\n\nTime
            Duration={1}", score, totalDuration));
            Application.Exit();
        }

        public void Start()
        {

            score = 0;
            IsGameOver = false;

            currentRedLightX = 0;
            currentRedLightY = 0;

            currentGreenLightX = width / 2;
            currentGreenLightY = height / 2;


            double minIterationDuration = SPEED; // 50 frames / sec

            //game loop
            while (!IsGameOver)
        {
            if (IsCollision())
            {
                score += 10;
            }

            DateTime startIterationTime = System.DateTime.UtcNow;
            UpdateGameState();
            Render();
            DateTime endIterationTime = System.DateTime.UtcNow;
            TimeSpan iterationDuration = endIterationTime - startIterationTime;
            totalDuration += iterationDuration;
            //totalDuration += iterationDuration.Duration();                
            if (iterationDuration.TotalMilliseconds < minIterationDuration)
                Thread.Sleep(Convert.ToInt32(minIterationDuration - 
                iterationDuration.TotalMilliseconds));

            Application.DoEvents();
        }

Answer 1

使用 StopWatch 而不是时间跨度计算耗时的类:

Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
// Do stuff ...
stopWatch.Stop();