Hi
Been trying to create a Spawn() method for a Spawener GameObject that receive a GameObject tag as a parametr. Although when I run a test I get an Error message ArgumentException: The Object you want to instantiate is null.
spawner code:
public class SpawnerScript : MonoBehaviour
{
public void Spawn (int amount , float span, string enemyTag)
{
GameObject Enemy;
Enemy = GameObject.FindGameObjectWithTag(enemyTag);
Debug.Log(enemyTag);
Debug.Log (Enemy);
float interval = amount / span;
for (int i = amount/-2 ; i <= amount/2; i++)
{
Instantiate(Enemy,new Vector3(transform.position.x + interval*i,transform.position.y,transform.position.z), Quaternion.identity);
}
}
}
and here is the script that call it:
public class LogicScript : MonoBehaviour
{
public SpawnerScript Spawner;
int amount =3;
float span = 10;
string enemyTag = "Enemy1";
// Start is called before the first frame update
void Start()
{
Spawner.Spawn(amount, span, enemyTag);
}
// Update is called once per frame
void Update()
{
}
}
First, remove the clutter from your scripts.
Inline your declarations :
GameObject Enemy = GameObject.FindGameObjectWithTag(enemyTag);
Remove unused Update method.
The problem is that :
Enemy = GameObject.FindGameObjectWithTag(enemyTag);
Returns null. It can’t find a game object with the tag enemyTag.
Possible solution : Add a game object in the scene with the given tag. FindObjectWithTag doesn’t work with prefabs that aren’t in the scene.
