Question

我有这个脚本：

 void Update()
    {
        //if Trigger is occur (like car collided with another car) and tram trigger is not in progress then resume the animation
        //it means that stopped car should be animate again
        if (isTriggerOccur && !objTramTriggerDetector.isTramTriggerInProgress)//&& objTramTriggerDetector.oneTimeOnly
        {
                Debug.Log("1:- " + triggerObjects.Count);
                Debug.Log("2:- " + triggerObjects2.Count);
                StartCoroutine(PlayAnimationOneByOne());
                StartCoroutine(PlayAnimationOneByOne2());

        }
    }

    IEnumerator PlayAnimationOneByOne(){


        foreach (var g in triggerObjects)
        {
            Debug.Log("t1 :" + g.name, g.gameObject);
            //Debug.Log("count : " + triggerObjects.Count);
            if (triggerObjects.IndexOf(g) == 0)
            {
                yield return new WaitForSeconds(Random.Range(.2f, .8f));
            }
            g.Speed = 0.05f;
            yield return new WaitForSeconds(Random.Range(.2f, .8f));

        }
        //triggerObjects.Clear();
    }

    IEnumerator PlayAnimationOneByOne2()
    {
        foreach (var g in triggerObjects2)
        {
            //Debug.Log(g.name, g.gameObject);
            //Debug.Log("count : " + triggerObjects2.Count);
            if (triggerObjects.IndexOf(g) == 0)
            {
                yield return new WaitForSeconds(Random.Range(.2f, .8f));
            }

            g.Speed = 0.05f;
            //triggerObjects2.Remove(g);
            yield return new WaitForSeconds(Random.Range(.2f, .8f));

        }
        //triggerObjects2.Clear();
    }

    static List<AnimationControlSpeed> triggerObjects = new List<AnimationControlSpeed>();
    static List<AnimationControlSpeed> triggerObjects2 = new List<AnimationControlSpeed>();

    void OnTriggerEnter(Collider c)
    {
        if (c.tag == "Car")
        {
            if (c.gameObject.GetComponent<AnimationControlSpeed>().Speed == 0)
            {
                if (gameObject.name.Contains("VehicleControl001") || gameObject.name.Contains("VehicleControl002"))
                {
                    if (!triggerObjects.Contains(gameObject.GetComponent<AnimationControlSpeed>()))
                    {
                        Debug.Log(gameObject.name + " added", gameObject);
                        triggerObjects.Add(gameObject.GetComponent<AnimationControlSpeed>());
                        //Debug.Log("t1 count : " +  triggerObjects.Count);
                    }
                }
                else if (gameObject.name.Contains("VehicleControl"))
                {
                    if (!triggerObjects2.Contains(gameObject.GetComponent<AnimationControlSpeed>()))
                    {
                        //Debug.Log(gameObject.name + " added in t2");
                        triggerObjects2.Add(gameObject.GetComponent<AnimationControlSpeed>());
                        //Debug.Log("t2 count : " + triggerObjects2.Count);
                    }
                }
                //storing last animation speed
                lastSpeed = gameObject.GetComponent<AnimationControlSpeed>().Speed;
                gameObject.GetComponent<AnimationControlSpeed>().Speed = 0;
                isTriggerOccur = true;
            }
        }
    }

    void OnTriggerExit(Collider c)
    {
        if (c.tag == "Car")
        {
            if (c.gameObject.GetComponent<AnimationControlSpeed>().Speed == 0)
            {
                isTriggerOccur = false;
            }
        }
    }

这个最简单的代码工作正常，但显示错误

InvalidOperationException：修改了集合;列举操作可能无法执行。 System.Collections.Generic.List 1+Enumerator[AnimationControlSpeed].VerifyState () (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/List.cs:778) System.Collections.Generic.List 1 +枚举[AnimationControlSpeed] .MoveNext （）（在 /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/List.cs:784） CarCollisionDetectionController + c__Iterator0.MoveNext （）（在资产/ TramCarAnimationCollisionController / CarCollisionDetectionController.cs：70）

Answer 1

如果在使用foreach通过此集合进行迭代时对集合进行了更改，则会发生此错误

这样的事情如下所示是不允许的，因为你在循环时改变循环信息。

List<string> newList = new List<string>();
                newList.Add("1");
                newList.Add("2");

                foreach (string content in newList)
                {
                        newList.Add("3");
                }

你可以使用for循环修复这样的东西，但在循环时要小心编辑你的集合。这实际上有很多可能产生错误。

问候。

InvalidOperationException：Collection已被修改;列举

1 个答案: