射線廣播未擊中任何物體

Question

為什么此代碼在觸摸后不打印任何內容？

    void Update()
{
    if (Input.touchCount > 0)
    {
        RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position), Vector2.zero);
        if (hit)
        {
            print(hit.transform.name);
        }
    }
}

Answer 1

嘗試這個：

if (Input.touchCount > 0)
    {
        RaycastHit2D hit;

        if (Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position), Vector2.zero, out hit))
        {
            print(hit.transform.name);
        }
    }