Help - get variable with GetComponent error

Unity Engine
1

Hi guys, i need some help here.

i want to get variable from another scene, but there’s some error and i don’t understand the error.

i have “sceneCity with scriptCity” and “sceneShop with scriptShop”.

in sceneCity i drag “gameObject with scriptShop” to " var sceneShop in sceneCity inspector".

this is the step what variable i want to get :

  1. when i click on shop button in sceneCity, i will move to sceneShop.
  2. in sceneShop, when i click cube button, my variable isCube become true and i will back into sceneCity.
  3. in sceneCity, i will print variable isCube after i click buy button at sceneShop

This is the error :
NullReferenceException: Object reference not set to an instance of an object
scriptCity.Start () (at Assets/scriptCity.js:42)

This is my script for sceneCity :

var sceneShop : scriptShop;

var isCube : boolean;

function Start () {
	sceneShop = gameObject.GetComponent(scriptShop);
isCube = sceneShop.isCube;
	print(isCube);
}

function OnGUI () {
if(GUI.Button(Rect(Screen.width / 2 + 220, Screen.height / 2 + 165, 50, 30),"Shop")){
		Application.LoadLevel("sceneShop");
	}
}

This is my script for sceneShop :

var isCube : boolean = false;
function OnGUI () {
if(GUI.Button(Rect(Screen.width / 2 - 100, Screen.height / 2 + 30, 50, 25),"Cube")){
		isCube = true;
		Application.LoadLevel("sceneCity");
	}
}

Hope you guys will help me.

Thanks :smile:

2

So - a few things here.

1- The error message you posted says the error is occurring in scriptCity.js which you did not post any code from.
2- If sceneCity has a public variable that you would presumably set via the Inspector then why are you setting it in Start()?
3- Your variable names are terrible. You have a variable named sceneShop which is actually of type scriptShop. sceneShop is also a type in and of itself so it becomes confusing rather quickly.

3

hahaha, sorry it’s my fault if you confused to see my code. But thanks for your input, i’ll change my code so it’s can be much better :smile:

and i already solved this problem, there’s someting i miss and wrong with my code and my step.

Thanks :smile: