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I am sending information from my item to my inventory. Telling the inventory to add the item. Gives me a null reference exception.

Item.js :

inventory.AddItem(this as GameObject);

Inventory.js :

var items : ArrayList;

function AddItem (item : GameObject) {

   items.Add(item.gameObject);  //Error happens here

}

Answer 1

0

this is not a GameObject; its class is derived from MonoBehaviour. You use the correct semantics later on:

.gameObject

Using the shorthand for this.gameObject works fine:

inventory.AddItem(gameObject);

However, you should use something other than an ArrayList; a List is probably what you want. Using .gameObject on item is useless; I don't even know why that compiles.

import System.Collections.Generic;

var items : List.<GameObject>;

function AddItem(item:GameObject) {
   items.Add(item);
}

answered Feb 21 '12 at 03:01 PM

Jessy
15.6k ● 72 ● 95 ● 196

i tried this but it gave me the same error.

Feb 21 '12 at 04:26 PM MithosAnnar

i did not read:

import System.Collections.Generic;

you are absolutely correct. Thank you so much for the many and helpful replies!

Feb 21 '12 at 04:30 PM MithosAnnar

Sorry, I tried to edit that line to be in the code, as I screwed up the initial answer, but QATO won't take the edit. If you get to the reputation level where you can edit the post, you can see that I actually committed the edit, but it won't display. I am not fond of QATO.

Feb 21 '12 at 05:08 PM Jessy

yeah no problem(its a problem I get all the time), thanks all the same.

Feb 21 '12 at 05:10 PM MithosAnnar

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Can't add GameObjects to ArrayList

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