Question

我已经在WPF中制作了一个蛇形游戏，可以在WASD上完美运行，但是当我使用箭头键代替时，使用完全相同的代码，每次按下键后滞后5秒钟。

游戏的一个特点是您可以调整游戏区域的大小。当游乐区尺寸较小时，延迟很短甚至不存在。当游戏区域较大时，延迟会更加明显。但是我认为问题不在于游戏大小，因为它在WASD上可以正常工作。

我用来捕获按键输入的代码如下：

    private void Window_KeyDown(object sender, KeyEventArgs e) {    // Window_KeyDown is called every time the user presses a key. If the key is one of W, A, S, D, Up, Down, Left, Right (movement direction) or Space (play/pause), it will call the relevant functions.
        if (gameStateBools.isInGame && !gameStateBools.isPaused) {
            switch (e.Key) {
                case (Key.Space):    // Space "Clicks" the playPauseButton.
                    playPauseButton.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
                    break;
                case (Key.W):    // W changes the pendingDirection to move up.
                    if (gameState.direction != 1) {
                        pending.pendingDirection = 0;
                        ArrowFromDirection();
                    }
                    break;
                case (Key.S):    // S changes the pendingDirection to move down.
                    if (gameState.direction != 0) {
                        pending.pendingDirection = 1;
                        ArrowFromDirection();
                    }
                    break;
                case (Key.A):    // A changes the pendingDirection to move left.
                    if (gameState.direction != 3) {
                        pending.pendingDirection = 2;
                        ArrowFromDirection();
                    }
                    break;
                case (Key.D):    // D changes the pendingDirection to move right.
                    if (gameState.direction != 2) {
                        pending.pendingDirection = 3;
                        ArrowFromDirection();
                    }
                    break;
                case (Key.Up):    // Up changes the pendingDirection to move up.
                    if (gameState.direction != 1) {
                        pending.pendingDirection = 0;
                        ArrowFromDirection();
                    }
                    break;
                case (Key.Down):    // Down changes the pendingDirection to move down.
                    if (gameState.direction != 0) {
                        pending.pendingDirection = 1;
                        ArrowFromDirection();
                    }
                    break;
                case (Key.Left):    // Left changes the pendingDirection to move left.
                    if (gameState.direction != 3) {
                        pending.pendingDirection = 2;
                        ArrowFromDirection();
                    }
                    break;
                case (Key.Right):    // Right changes the pendingDirection to move right.
                    if (gameState.direction != 2) {
                        pending.pendingDirection = 3;
                        ArrowFromDirection();
                    }
                    break;
            }
        }
    }

编辑：我已经开源了该项目，因为它是固定的：） https://github.com/jacobcxdev/UTC-Snake。请注意，这是我的第一个C＃项目，所以我可能使很多事情变得过于复杂了！

Answer 1

在所有情况下都设置e.Handled = true。

箭头键在WPF框架中具有一个功能（定位，调整大小）。如果您指示用户代码已处理它们，则它们将不再转发到窗口框架，这显然需要花费时间来处理这些窗口。

另一种选择是通过覆盖OnPreviewKeyDown并在事件管道中更早地捕获击键，并仅将其作为您未处理的击键的基础。

箭头键会导致WPF游戏的巨大延迟

1 个答案: