科罗廷没有被调用

Question

你好，

我刚开始编码，所以请耐心等待。我有一个协同程序，我想打电话给它，所以我的重生有点延迟。然而，除了延迟，它什么都做。Unity C#：(

private void OnTriggerEnter2D(Collider2D collision)
{
if (collision.CompareTag("Player"))
{
Destroy(gameObject);
StartCoroutine(Reset());

}
}
IEnumerator Reset()
{
yield return new WaitForSeconds(4);
LevelManager.instance.Respawn();
}
}

Answer 1

很简单，对象已经被销毁，所以下一帧Destroy(gameObject);之后的内容(Script(不会起作用，正如我在评论中告诉你的那样，在IEnumerator上设置一条日志消息来查看它。要了解它是如何工作的：请检查此脚本

void Awake() // the First Call // all lines inside Awake is Called
{
Destroy(gameObject); // Object is now Destroyed
print(1); // on the Same Frame Call // Printed 
StartCoroutine(Reset()); // Called
}
IEnumerator Reset()
{
print(2); // will printed ... Called and on the same frame
yield return new WaitForSeconds(1); // Called but will be destroyed in the next frame
print(3); // not printed ..
}
private void Start() // Start will be called after the Awake calls are finished and the object still exists and is active so it will not be Called
{
print(4); // not printed ..
}

Answer 2

正如Mohamed所指出的，执行游戏对象在帧结束时正确触发WaitForSeconds之前就被破坏了，因此您的代码无法到达LevelManager.instance.Respawn((。如果像这样在Respawn((之后执行destroy，会干扰流的其余部分吗？

private void OnTriggerEnter2D(Collider2D collision)
{
if (collision.CompareTag("Player"))
{
StartCoroutine(Reset());
}
}
IEnumerator Reset()
{
yield return new WaitForSeconds(4);
LevelManager.instance.Respawn();
Destroy(gameObject);
}

}