统一分步执行条件

Question

When I execute the first if condition, it does not check the inside if condition. Why is this so? I'm trying to put myself in a mind of a user. They might choose b1 and then choose b2 later on. Or they might choose b2 and then choose b1 later on. However, when I tried to choose b1 first and then b2 second, it goes automatically to the third if condition which is when they choose b2 first.

private void OnTriggerEnter2D(Collider2D collision)
{
  if (collision.gameObject.CompareTag("b1"))
  {
     transform.GetChild(0).gameObject.SetActive(false);
     transform.GetChild(1).gameObject.SetActive(true);

     if (collision.gameObject.CompareTag("b2"))
     {
        transform.GetChild(1).gameObject.SetActive(false);
        transform.GetChild(3).gameObject.SetActive(true);
      }
  }

  if (collision.gameObject.CompareTag("b2"))
  {
     transform.GetChild(0).gameObject.SetActive(false);
     transform.GetChild(2).gameObject.SetActive(true);

     if (collision.gameObject.CompareTag("b1"))
     {
         transform.GetChild(2).gameObject.SetActive(false);
         transform.GetChild(3).gameObject.SetActive(true);
     }

}

Answer 1

When I execute the first if condition, it does not check the inside if condition

Because thats impossible. You're saying 'If the tag is b1, and if the tag is b2'. The tag cannot be both, its either b1 or b2.

If the user chooses b2 at a later point, the method is called again and is executed from the top. It doesnt just continue where it left off last time.

If you want this behaviour you'll have to add extra logic, for example keep track which tags have been collided with in the past.