why does my object reference go out of scope?

Questions & Answers
1

Hi.

I’ve got a scene with two cubes. cube1 and cube2.
cube1 has a script attached called script1. cube2 has a script attached called script2.

I’m trying to reference a variable in script1 from script2.

My code looks like this.

using UnityEngine;
using System.Collections;

public class script2 : MonoBehaviour {

	// Use this for initialization
	void Start () {
	
		GameObject cube1 = GameObject.Find ("Cube1");
		script1 myScript = cube1.GetComponent<script1>();

		Debug.Log (myScript.testFloat); //this works fine.

	}



	// Update is called once per frame
	void Update () {
		Debug.Log (myScript.testFloat); //this doesn't work.
	}
}

The 1st debug.log statement gives me the value of testFloat.
the second one (the one in update) returns the following error.

The name `myScript’ does not exist in the current context

Why does the reference to script1 seemingly go out of scope in update?

2

Because you declared the variable inside Start. So it does only exist in Start. You have to declare it as a member variable of your class and assign / initialize it in Start:

public class script2 : MonoBehaviour
{
    script1 myScript; // private member variable of the "script2" class
    
    // Use this for initialization
    void Start ()
    {
        GameObject cube1 = GameObject.Find ("Cube1");
        myScript = cube1.GetComponent<script1>();
    }