Question

这个问题很奇怪，为此我道歉。我正在努力创造一个小游戏，而且我很难用一台状态机。

枚举类型

public enum Phase
{
    FirstPhase,
    SecondPhase,
    ThirdPhase,
    FourthPhase;
};

代码

public Phase currentPhase = Phase.FirstPhase;

public KeyboardState keyboardState;

public KeyboardState oldKeyboardState;

void Update(GameTime gameTime)
{
    oldKeyboardState = keyboardState;
    keyboardState = Keyboard.GetState();

    switch (currentPhase)
    {
        case FirstPhase:

            //just throws the phase to be secondPhase
            currentPhase = Phase.SecondPhase;

            break;

        case SecondPhase:
            //wait for input

            if (keyboardState.IsKeyDown(Keys.Enter) && oldKeyboardState.IsKeyUp(Keys.Enter))
            {
                currentPhase = Phase.ThirdPhase;
            }
            break;

        case ThirdPhase:
            //do some calculation stuff, decide on something, etc.
            if (keyboardState.IsKeyDown(Keys.Enter) && oldKeyboardState.IsKeyUp(Keys.Enter))
            {
                currentPhase = Phase.FourthPhase;
            }
            break;

        case FourthPhase:

            //end of phases, exit or do nothing, etc.
            break;
    }
}

问题发生在SecondPhase进入第三阶段时，似乎总是想跳过ThirdPhase并直接转到FourthPhase，因为输入仍然被按下，但我想它应该只做一个＆＃34;阶段＆＃34;在Update的一次通话中最多，所以在您再次按 之前不应该转到FourthPhase？

Answer 1

最简单的解决方案是翻转键上/下逻辑。

if (keyboardState.IsKeyUp(Keys.Enter) && oldKeyboardState.IsKeyDown(Keys.Enter)) 
{ 
     currentPhase = Phase.ThirdPhase; 
}

这应该具有仅在用户按下后释放回车键时改变状态的效果。

它会有一种略微不同的感觉＆＃34;对于输入，但如果你能接受它，这是一个很好的简单解决方案。

如何使KeyboardState不用状态机吹掉switch语句？

1 个答案: