Unity - 如果即使条件为假也执行块

Question

这是我的代码：

void Update () {
    //------------ CHECKING "IF RUNNING" FOR ALL ACTIONS FROM LOCAL PLAYER ---------------------- 
    if (MatchManager.GetMMInstance().Running)
    {
        Debug.Log("I Am Running");
        // ---------- orbiting and sending it -------------
        //if (Input.GetKeyDown(KeyCode.D))
        ClockwiseOrbitButton.GetComponent<Button>().onClick.AddListener(() =>
        {
            if (ClockwiseOrbitPressPermit)
            {
                ClockwiseOrbitPressPermit = false;
                if (MatchManager.GetMMInstance().NearCabin.Local)
                {
                    // we send this before we start our orbit that maybe it compensate possibly delay of internet. also we send it once again in the end of continousorbit with speed value of zero.
                    Network.GetNetInstance().SendOrbit(1, MatchManager.GetMMInstance().NearCabin.Center.transform.rotation.eulerAngles, 1, InitialOrbitSpeed);
                    Orbit(1, MatchManager.GetMMInstance().NearCabin.Center.transform.rotation.eulerAngles, 1, InitialOrbitSpeed, BaseDeceleratorAmount);
                }
                else if (MatchManager.GetMMInstance().MidCabin.Local)
                {
                    // we send this before we start our orbit that maybe it compensate possibly delay of internet. also we send it once again in the end of continousorbit with speed value of zero.
                    Network.GetNetInstance().SendOrbit(2, MatchManager.GetMMInstance().MidCabin.Center.transform.rotation.eulerAngles, 1, InitialOrbitSpeed);
                    Orbit(2, MatchManager.GetMMInstance().MidCabin.Center.transform.rotation.eulerAngles, 1, InitialOrbitSpeed, BaseDeceleratorAmount);
                }
                else if (MatchManager.GetMMInstance().FarCabin.Local)
                {
                    // we send this before we start our orbit that maybe it compensate possibly delay of internet. also we send it once again in the end of continousorbit with speed value of zero.
                    Network.GetNetInstance().SendOrbit(3, MatchManager.GetMMInstance().FarCabin.Center.transform.rotation.eulerAngles, 1, InitialOrbitSpeed);
                    Orbit(3, MatchManager.GetMMInstance().FarCabin.Center.transform.rotation.eulerAngles, 1, InitialOrbitSpeed, BaseDeceleratorAmount);
                }
                StartCoroutine(ReactiveOrbit(OrbitCoolDown));
            }
        });
        //if (Input.GetKeyDown(KeyCode.A))
        CoClockwiseOrbitButton.GetComponent<Button>().onClick.AddListener(() =>
        {
            if (CoClockwiseOrbitPressPermit)
            {
                CoClockwiseOrbitPressPermit = false;
                if (MatchManager.GetMMInstance().NearCabin.Local)
                {
                    // we send this before we start our orbit that maybe it compensate possibly delay of internet. also we send it once again in the end of continousorbit with speed value of zero.
                    Network.GetNetInstance().SendOrbit(1, MatchManager.GetMMInstance().NearCabin.Center.transform.rotation.eulerAngles, 2, InitialOrbitSpeed);
                    Orbit(1, MatchManager.GetMMInstance().NearCabin.Center.transform.rotation.eulerAngles, 2, InitialOrbitSpeed, BaseDeceleratorAmount);
                }
                else if (MatchManager.GetMMInstance().MidCabin.Local)
                {
                    // we send this before we start our orbit that maybe it compensate possibly delay of internet. also we send it once again in the end of continousorbit with speed value of zero.
                    Network.GetNetInstance().SendOrbit(2, MatchManager.GetMMInstance().MidCabin.Center.transform.rotation.eulerAngles, 2, InitialOrbitSpeed);
                    Orbit(2, MatchManager.GetMMInstance().MidCabin.Center.transform.rotation.eulerAngles, 2, InitialOrbitSpeed, BaseDeceleratorAmount);
                }
                else if (MatchManager.GetMMInstance().FarCabin.Local)
                {
                    // we send this before we start our orbit that maybe it compensate possibly delay of internet. also we send it once again in the end of continousorbit with speed value of zero.
                    Network.GetNetInstance().SendOrbit(3, MatchManager.GetMMInstance().FarCabin.Center.transform.rotation.eulerAngles, 2, InitialOrbitSpeed);
                    Orbit(3, MatchManager.GetMMInstance().FarCabin.Center.transform.rotation.eulerAngles, 2, InitialOrbitSpeed, BaseDeceleratorAmount);
                }
                StartCoroutine(ReactiveOrbit(OrbitCoolDown));
            }

        });


        // ---------- Shooting and sending it ------ - - - - - - -

        ShootButton.GetComponent<Button>().onClick.AddListener(() =>
        {
            if (ShootPressPermit)
            {
                ShootPressPermit = false;
                if (MatchManager.GetMMInstance().NearCabin.Local)
                {
                    // we send this before we Shoot, maybe it compensate possibly delay of internet.
                    Network.GetNetInstance().SendProduceBullet(1);
                    Shoot(1);
                }
                else if (MatchManager.GetMMInstance().MidCabin.Local)
                {
                    // we send this before we Shoot, maybe it compensate possibly delay of internet.
                    Network.GetNetInstance().SendProduceBullet(2);
                    Shoot(2);
                }
                else if (MatchManager.GetMMInstance().FarCabin.Local)
                {
                    // we send this before we Shoot, maybe it compensate possibly delay of internet.
                    Network.GetNetInstance().SendProduceBullet(3);
                    Shoot(3);
                }
                StartCoroutine(ReactiveShooting(MatchManager.GetMMInstance().LocalShootCoolDown));
            }
        });

        // ------------------ switching target and send it ----------------

        SwitchTargetButton.GetComponent<Button>().onClick.AddListener(() =>
        {
            if (SwitchTargetPressPermit)
            {
                SwitchTargetPressPermit = false;
                if (MatchManager.GetMMInstance().NearCabin.Local)
                {
                    // we send this before we Switch, maybe it compensate possibly delay of internet.
                    Network.GetNetInstance().SendSwitchTarget(1);
                    SwitchTarget(1);
                }
                else if (MatchManager.GetMMInstance().MidCabin.Local)
                {
                    // we send this before we Switch, maybe it compensate possibly delay of internet.
                    Network.GetNetInstance().SendSwitchTarget(2);
                    SwitchTarget(2);
                }
                else if (MatchManager.GetMMInstance().FarCabin.Local)
                {
                    // we send this before we Switch, maybe it compensate possibly delay of internet.
                    Network.GetNetInstance().SendSwitchTarget(3);
                    SwitchTarget(3);
                }
                StartCoroutine(ReactiveSwitchTarget(SwitchTargetCoolDown));
            }
        });

        //-----------------------  END OF ACTION SCOPE -----------------------------

        // ----------------- WAITING AND CHECKING SOME EVENT -----------------------
        // ** these events can happen only during running state

        WaitingForCrippling();

        // ---------------------- END OF WAIT AND CHECK ----------------------------
    }

    // --------------- SOME CONTINUOUS UPDATING METHODS ---------------------
    // these actions don't need to be in running block and don't depend on running state. can happen in any moments. 
    UpdateTargetPosition();
    Debug.Log(MatchManager.GetMMInstance().Running.ToString());
}

当场景运行时，“Running”值会在几秒钟内变为“false”，然后它会变为“true”。它将一直保持这种状态，直到玩家的生命值变为 0，此时它将再次变为“false”（这是一个多人游戏，有 3 名玩家）。

if 块包含一些在按下 UI 按钮时运行的代码。在开始时“正在运行”为假的那几秒钟，一切正常（按下按钮不起作用）。

当它变为 true 时，它​​再次正常工作（按下按钮将遵循正确的操作）。但是，当玩家的生命值达到 0 并且“Running”变量变为“false”时，我仍然可以按下按钮以及动作和事件 还会发生！

我不知道问题是什么。我将Debug.Log("I Am Running"); 和Debug.Log(MatchManager.GetMMInstance().Running.ToString()); 放入代码中，正如您所见并观察每帧“Running”变量的值。

我已经看到它是“假”的，按下按钮仍然会执行诸如环绕和切换目标之类的操作！

Answer 1

您需要保存所有按钮的操作 (Events.UnityAction) 并在“正在运行”为 false 时将其删除，即：

void Update () {
//------------ CHECKING "IF RUNNING" FOR ALL ACTIONS FROM LOCAL PLAYER ---------------------- 
    if (MatchManager.GetMMInstance().Running)
    {
        //...your previous code
        //save references to Events.UnityActions
    } 
    else
    {
        ClockwiseOrbitButton.GetComponent<Button>().onClick.RemoveListener(referenseToTheAction1);
        CoClockwiseOrbitButton.GetComponent<Button>().onClick.RemoveListener(referenseToTheAction2);

        // etc.; remove all Events.UnityAction listeners from other buttons.
    }
}

或者您可以为每个按钮调用else 语句SomeButton.GetComponent<Button>().onClick.RemoveAllListeners();，而无需保存对Events.UnityActions 的引用。

Answer 2

当您为按钮添加 onClick 侦听器时按下按钮时发生该操作是正常的，该按钮将始终执行您在侦听器中指定的操作。

如果你想让它停止，你应该在你的值为 false 时移除监听器。您可以使用 RemoveAllListeners. 将它们全部删除

添加点击侦听器的意义在于，您只需指定一次按钮点击应该执行的操作，并且每次按钮点击都会执行完全相同的操作。

---

我建议您只在启动函数中添加一次 onClick 侦听器，当您需要按钮停止工作时，您可以禁用该按钮。这样你就不会总是在每一帧都设置一个新的 onClick 监听器。

要禁用该按钮，您可以将 interactable property 设置为 false

ClockwiseOrbitButton.GetComponent<Button>().interactable = false;

然后，当您需要再次交互时，您可以随时将其设置回true

ClockwiseOrbitButton.GetComponent<Button>().interactable = true;