Question

我正在尝试销毁预制件，但它仍会更改其比例，但是它给我一个错误：“ boxcolider2d类型的对象已被销毁，但您仍在尝试访问它”。以下是我的代码

private void OnTriggerEnter2D(Collider2D collision)
{
    StartCoroutine(ReScale(new Vector3(.5f, .5f), new Vector3(0.1f, 0.1f), collision));
    Destroy(collision.gameObject,.5f);
}

private IEnumerator ReScale(Vector3 from, Vector3 to, Collider2D gameObjectCollided)
{
    float progress = 0;

    while (progress <= 1 && gameObjectCollided.gameObject != null)
    {
        gameObjectCollided.transform.localScale = Vector3.Lerp(from, to, progress);
        progress += Time.deltaTime;
        yield return null;
    }
    gameObjectCollided.transform.localScale = to;

}

我应该在代码中添加什么？

Answer 1

在销毁IEnumerator之后，您仍在尝试访问GameObject：

gameObjectCollided.transform.localScale = to;

您可以在设置比例之前添加检查以查看对象是否仍然存在：

if(gameObjectCollided.gameObject != null) 
{
    gameObjectCollided.transform.localScale = to;
}

Answer 2

您启动对对象进行操作的协程，并立即销毁它。这没有什么意义。基本上，您要问您的游戏引擎是“开始更改比例，然后等待下一帧，并在此帧上销毁它”。我想这不是您真正想要做的。我最好的选择是，您想要的是“在碰撞时，开始缩小对象，完成缩小后，销毁它”。在这种情况下，您需要将<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous"> <div class="row p-3"> <div class="col-12"> <h5 class="text-center">Color Legend</h5> </div> <div class="col-12"> <div class="row"> <div class="col-3"> <i class="far fa-circle circle px-2">I</i> </div> <div class="col-9"> <p>Not visited topic</p> </div> </div> </div> <div class="col-12"> <div class="row"> <div class="col-3"> <i class="far fa-circle circle px-2" style="color:#016fc9;">I</i> </div> <div class="col-9"> <p>Visted topic</p> </div> </div> </div> <div class="col-12"> <div class="row"> <div class="col-3"> <i class="far fa-circle circle px-2" style="color:#00bfa5">I</i> </div> <div class="col-9"> <p>Visted topic, pop-up question <strong>successfully</strong> answered.</p> </div> </div> </div> <div class="col-12"> <div class="row"> <div class="col-3"> <i class="far fa-circle circle px-2" style="color:#f44336">I</i> </div> <div class="col-9"> <p>Visted topic, pop-up question <strong>failed</strong> after visting.</p> </div> </div> </div> </div>移至协程中，这是最后一条指示（我将删除延迟）：

Destroy(collision.gameObject,.5f);

如果您需要在销毁对象之前停止协程：

private IEnumerator ReScale(Vector3 from, Vector3 to, Collider2D gameObjectCollided)
{
 float progress = 0;
 while (progress <= 1 && gameObjectCollided.gameObject != null)
    {
     gameObjectCollided.transform.localScale = Vector3.Lerp(from, to, progress);
     progress += Time.deltaTime;
     yield return null;
    }
    gameObjectCollided.transform.localScale = to;
    Destroy(collision.gameObject);
}

在仍然改变其比例的同时销毁游戏对象

2 个答案: