How to assign GameObject to a instantiated prefab?

Questions & Answers
1

How would i go about assigning a clone game object (craftSystem) to instantiated prefab?

Instantiated prefab script:

using UnityEngine;
using System.Collections;

public class WorkingStation : MonoBehaviour
{

    public KeyCode openInventory;
    public GameObject craftSystem;
    public int distanceToOpenWorkingStation = 3;
    bool showCraftSystem;
    Inventory craftInventory;
    CraftSystem cS;


    // Use this for initialization
    void Start()
    {
        if (craftSystem != null)
        {
            craftInventory = craftSystem.GetComponent<Inventory>();
            cS = craftSystem.GetComponent<CraftSystem>();
        }
    }

    // Update is called once per frame
    void Update()
    {
        float distance = Vector3.Distance(this.gameObject.transform.position, GameObject.FindGameObjectWithTag("Player").transform.position);

        if (Input.GetKeyDown(openInventory) && distance <= distanceToOpenWorkingStation)
        {
            showCraftSystem = !showCraftSystem;
            if (showCraftSystem)
            {
                craftInventory.openInventory();
            }
            else
            {
                cS.backToInventory();
                craftInventory.closeInventory();
            }
        }
        if (showCraftSystem && distance > distanceToOpenWorkingStation)
        {
            cS.backToInventory();
            craftInventory.closeInventory();
        }
    }
}

Code used to instantiate the prefab:

public void SetItem(GameObject b)
    {
        hasPlaced = false;
        currentBuilding = Instantiate(b).transform;
        placeableBuilding = currentBuilding.GetComponent<PlaceableBuilding>();
    }

Basically what I’m trying to do is a building system and while instantiating works fine the public GameObject craftSystem is empty and dont work.

PS the plubic gameobject is a clone itself in hierarchy

2

If what you want is to keep a reference to the instanciated object, then you can simply get the return value cast to GameObject :

currentBuilding = (GameObject) Instantiate(b);
currentBuildingTransform = currentBuilding.transform;

If what you want is to reassign/change a Prefab at runtime, that is not possible.