so i made a camera script to follow the player on the x axis but now i get the error:
Object reference not set to an instance of an object
PlayerCamera.Update () (at Assets/Script/PlayerCamera.cs:18)
public class PlayerCamera : MonoBehaviour
{
private GameObject Player;
// Start is called before the first frame update
void Start()
{
Player = GameObject.FindGameObjectWithTag("Player");
}
// Update is called once per frame
void Update()
{
transform.position = new Vector3(Player.transform.position.x, transform.position.y, transform.position.z);
}
}
ALSO on line 11 FindGameObjectWithTag i forgot the “s” after Object but in another script it worked and i did not find the documentation for .FindGameObjectWithTag
Did you check that your player object has the tag player in the inspector?
You might wanna try this → Unity - Scripting API: GameObject.FindWithTag -
difference between GameObject.FindGameObjectWithTag(Tag tag) and GameObject.FindWithTag(Tag tag) - Questions & Answers - Unity Discussions
FindGameObjectsWithTag returns an array of objects while without the ‘s’ it should return the first one it finds
New
i dont know if thats the problem but i use a script to spawn a prefab of the player but beford is used to work with that script and the prefab does have the tag Player
Are you calling the FinGameobjectWithTag before you spawn the player? You could Check by Logging when the player is spawned then when you call the FindGameObjectWithTag
There is only ONE answer and it’s ALWAYS the same!
How to fix a NullReferenceException error
https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/
Three steps to success:
- Identify what is null ← any other action taken before this step is WASTED TIME
- Identify why it is null
- Fix that
So what is is null is the “private GameObject Player”
why is it null its because the “find game object” gets executed beford the prefeb is initiated
how do i fix it i could put the “Player = GameObject.FindGameObjectWithTag(“Player”);” in an if statment and in update but i feel like its a bad habit to do since it might reduce performance also i did not mention this its a 2D project
Thanks for the help
That’s how you do late / lazy lookup / location of resources.
Given private GameObject Player; in your class, then in Update():
if (!Player)
{
Player = .... (whatever slow locator code here)
if (!Player) return;
}
// use Player here...
Once it finds the Player things will proceed apace.