CODEWITHSUNDEEP
c#unity-container
Rony
Rony

Reputation: 345

Null Reference Exception Error - Unity,C#

I am getting "NullReferenceException: Object reference not set to an instance of an object", I dont know what is wrong in my code:

I have a class "EnemyInfo" as

public class EnemyInfo  {   
public GameObject enemyObject;  
}

In another class "Enemies" I am using it like this:

public class Enemies :  MonoBehaviour  {    

public static List<GameObject> gos;
public static List<EnemyInfo> gosN = new List<EnemyInfo>();

void FixedUpdate() {
gos = new List<GameObject>(GameObject.FindGameObjectsWithTag("enemy"));
gosN.Add(null)
gosN[0].enemyObject = gos[0].gameObject   //here I am getting error, dont know y :S

}
}

Upvotes: 0

Views: 1682

Answers (4)

Hussein Zawawi
Hussein Zawawi

Reputation: 2937

The list is empty, you don't have an instance to refer to public instance members

Upvotes: 1

Vlad
Vlad

Reputation: 35594

Clearly, after

gos.Add(null)

you have gos[0] == null. So gos[0].gameObject dereferences null-reference.

Upvotes: 0

Oded
Oded

Reputation: 499132

I suspect gos[0].gameObject is the issue.

If gos is empty to begin with, doing gos.Add(null), adds a null entry.

You then access this value with gos[0] and try to invoke a member on it - since this is a null, you are getting a NullReferenceException.

Don't add a null GameObject.

Upvotes: 2

Shai
Shai

Reputation: 25595

Thats because gos contains only one object which is null.

that's why you're getting a NullReferenceException.

Upvotes: 5

Related Questions