GetComponent returns null
Hi all,
I am receiving null when I perform a GetComponent(). I saw that this problem is quite frequently asked on this forum, in these cases the problem is mostly caused by: - The script not being attached to the gameobject - The instance variable not being initialized
I don't think this is the cause here though - or I am missing something. As following my code (note that I am new to Unity). In the console log I can see the following output:
Start
PlayerBall is null
End
Meaning the LineRenderer linked to the gameobject can be resolved, but the Player object can not.
Player class:
public class Cue : MonoBehaviour {
public GameController game;
public LineRenderer line;
public Player playerBall;
Cue()
{
}
void Start () {
Debug.Log("Start");
line = GetComponent<Cue>().line;
if (line == null)
{
Debug.Log("Line is null");
}
playerBall = GetComponent<Player>();
if (playerBall == null)
{
Debug.Log("PlayerBall is null");
}
Debug.Log("End");
}
// Update is called once per frame
void FixedUpdate()
{
/* do stuff */
}
void OnMouseDown()
{
}
}
In Unity, the following properties are set:
The Player object:
public class Player : MonoBehaviour
{
private int count;
public Text UIScore;
public Rigidbody rb;
protected void Start()
{
rb = GetComponent<Rigidbody>();
count = 0;
updateScore();
}
void FixedUpdate()
{
/* do stuff*/
}
void OnMouseDown()
{
/* do stuff */
}
void OnCollisionEnter(Collision collision)
{
if (collision.gameObject.CompareTag("Ball"))
{
count++;
}
updateScore();
}
void updateScore()
{
UIScore.text = "Player ball Collision count: " + count.ToString();
}
}
Answer by mahdiii · Dec 08, 2015 at 03:07 PM
you wrote a dirty code. In Cue class you have line object(LineRenderer) so you don't need to use "line = GetComponent().line;" and also "playerBall = GetComponent()";
I think I misunderstood how that worked, I'm still learning Unity as you can see :-).
Thanks a lot for the information, removing the lines 'GetComponent' for both objects fixed the issue as you said.
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