Hide/Show GameObject from script

Questions & Answers
1

So here’s my dilema. I am trying to display a hat (The game object is called “Party” because it is a party hat) on my character by having the player click a button in a menu that sets the hat’s renderer to true. The hat is a child of my 2d character and the hat’s sprite renderer’s check box is unchecked (which I am assuming means that the renderer is false). When I run the game and click the button in the menu, Unity gives me an error saying “Object reference not set to an instance of an object” and the hat does not display in game. Here’s my script:
using UnityEngine;
using System.Collections;

public class HatSelectMenu : MonoBehaviour {

	private GameObject party;
	// Use this for initialization
	void Start () {
		party =  GameObject.Find("Party");
	}
	
	// Update is called once per frame
	void OnGUI () {
		if(GUI.Button (new Rect(Screen.width / 2 - 50, Screen.height /  2 + 20, 200, 75), "Show Hat"))
		{
			party.renderer.enabled = true;
			
		}
		if(GUI.Button (new Rect(Screen.width / 2 - 30, Screen.height /  2, 100, 50), "Main Menu"))
		{
			Application.LoadLevel(0);
		}
	}
}

If you need any clarification I would be happy to help.

3

using UnityEngine;
using System.Collections;

public class HatSelectMenu : MonoBehaviour {
     
        public GameObject party; // Drag here party hat gameobject.
        // Use this for initialization
        void Start () {
        }
     
        // Update is called once per frame
        void OnGUI () {
           if(GUI.Button (new Rect(Screen.width / 2 - 50, Screen.height /  2 + 20, 200, 75), "Show Hat"))
           {
             if(party.activeSelf)
                party.SetActive(true);
             if(party.renderer)
                party.renderer.enabled = true;
             else print("Where is my hat?");
     
           }
           if(GUI.Button (new Rect(Screen.width / 2 - 30, Screen.height /  2, 100, 50), "Main Menu"))
           {
             Application.LoadLevel(0);
           }
        }
    }
2

Check your casing. And maybe tag your hat with “Hat” and use

 party = GameObject.FindGameObjectWithTag("Hat");