koobas.hobune.stream
The question is answered, right answer was accepted
NullReferenceException, Script Error
Hi,
I wrote a script that should manage that a bool in the animater turns true or false if a BoxCollider2D from the Player called "groundCheck" got triggered by the ground or not. After I finished it and added the script it doesn't worked as I wanted to. An error says:"NullReferenceExeption: Object refernce not set to an instance of an object [...]" I don't know how to fox it. The error seems to apear in line 16 and 21. There is another post in this forum which tells how to fix it but I don't understand it.
using UnityEngine;
using System.Collections;
public class GroundCheck : MonoBehaviour {
private Player player;
void start()
{
player = gameObject.GetComponentsInParent<Player>()[0];
}
void OnTriggerEnter2D(Collider2D col)
{
player.grounded = true;
}
void OnTriggerExit2D(Collider2D col)
{
player.grounded = false;
}
}
Take a look at some of the other questions and answers tagged with nullreferenceexception.
I tryd the "Try/Catch" $$anonymous$$ethod but it doesn't fixed the problem, here is the code: using UnityEngine; using System.Collections;
public class GroundCheck : $$anonymous$$onoBehaviour {
private Player player;
void start()
{
player = gameObject.GetComponentsInParent<Player>()[0];
}
void OnTriggerEnter2D(Collider2D col)
{
try {
player.grounded = true;
}
catch (NullReferenceException ex) {
Debug.Log("player.grounded was not set in the inspector")
}
}
void OnTriggerExit2D(Collider2D col)
{
player.grounded = false;
}
}
I also tryd the "Null check" but also it doesn't helped: using UnityEngine; using System.Collections;
public class GroundCheck : $$anonymous$$onoBehaviour {
private Player player;
void start()
{
player = gameObject.GetComponentsInParent<Player>()[0];
}
void OnTriggerEnter2D(Collider2D col)
{
player.grounded = true;
if (player.grounded) {
Debug.Log(player.grounded.name);
} else {
Debug.Log("")
}
void OnTriggerExit2D(Collider2D col)
{
player.grounded = false;
}
}
player is never getting initialized because the place that you think you're setting it - start() - never gets called.
change it to Start() and it should fix your problem ;)
Ok, it solved the NullReferenceExcepttion but the bool of the animator still won't turn true if the player is grounded.
