我能倒"一个布尔吗？

Question

我有一些检查,看看屏幕是否有效.代码如下所示:

if (GUI.Button(new Rect(Screen.width / 2 - 10, 50, 50, 30), "Rules")) //Creates a button
    {
        if (ruleScreenActive == true) //check if the screen is already active
            ruleScreenActive = false; //handle according to that
        else 
            ruleScreenActive = true;
    }

有没有办法 - 每当我点击按钮 - 反转的值ruleScreenActive？

(这是Unity3D中的C#)

Answer 1

你可以通过否定bool的值来摆脱你的if/else语句:

ruleScreenActive = !ruleScreenActive;

Answer 2

我认为最好写:

ruleScreenActive ^= true;

这样你就可以避免两次写变量名......这会导致错误

Answer 3

ruleScreenActive = !ruleScreenActive;

Answer 4

这将是内联的,因此可读性增加,运行时成本保持不变:

public static bool Invert(this bool val) { return !val; }

给:

ruleScreenActive.Invert();