NullReferenceException: Array C#

Questions & Answers
1

Hi

I am getting this error “NullReferenceException: Object reference not set to an instance of an object” with this code. And I really cant see what I am doing wrong?

using UnityEngine;
using System.Collections;

public class PrefabLibrary : MonoBehaviour 
{
    public PrefabSettings[] prefabSettings;

    public enum idPrefab
    {
        Storage,
        DefenceTurret,
        Engineering,
        RecyclePlant,
        WaterPlant,
        BioDome,
        Corridor,
        Barracks,
        ScienceLab,
        LaunchPad,
        RocketSilo,
        PowerPlant
    }

    void Start()
    {
        prefabSettings = new PrefabSettings[30];

        prefabSettings[1].obj = null;
    }
}

public class PrefabSettings
{
    public GameObject obj;
    public int id;
}
2

On line 26, you create the space for the array, but each entry of the array is null. You have to initialize each entry of the array to point to a ‘PrefabSettings’ object. Something like:

for (int i = 0; i < prefabsSettings.Length; i++) {
    prefabSettings *= new PrefabSettings;*

}
Alternately, you could declare PrefabSettings as a struct instead of a class. As a struct, it would be a value type and would be contained in the array (rather than a reference to a class).