Why am i getting "Tag not defined" on this code

I cant figure out why im getting "Tag not defined" exception on my gameObject.tag = thisID.ToString(); from what ive read this should be the right way to apply a tag to an object manually?

Code (CSharp):

1.  
2.     void Start()
3.     {
4.         GameObject aScript = GameObject.Find("DotSpawner");
5.         scriptSpawnDot myDotSpawnClass = aScript.GetComponent<scriptSpawnDot>();
6.  
7.         thisID = myDotSpawnClass.DotID;
8.         myDotSpawnClass.DotID += 1;
9.  
10.         Destroy(gameObject, 3);
11.  
12.         gameObject.tag = thisID.ToString(); /// This Line
13.  
14.         startLineRenderer();
15.  
16.     }

 

I think this is because the tag must first exist in the tag list before you can assign an gameobject to that tag. As per here: http://answers.unity3d.com/questions/33597/is-it-possible-to-create-a-tag-programmatically.html

 

Hi,

I think you have to declare the tag before using it. Looking in the documentation here http://docs.unity3d.com/ScriptReference/GameObject-tag.html it seems that you can't just use an ID for a tag if it has not been defined up front.

from the linked page...

"A tag can be used to identify a game object. Tags must be declared in the Tags and Layers manager before using them."

 

God dammit this screws up my whole code then

 

Why don't you just have a class attached to them gameObject's which you use GetComponent on, and give that a string variable called tag? It's a simple workaround .

 

@Nigey just so I can understand for my own reference, that would make the code look something like...

Code (CSharp):

1. gameObject.myObject.tag = this.id.ToString();

Is that what you had in mind?

(obviously not called myObject in real life )

 

i got it to work, instead of setting the Tag of the gameobject i simply changed the name of it instead and used Find to find it by name Onwards to next problem!


99 little bugs in the code
99 little bugs in the code
Take one down, patch it around
117 little bugs in the code..... Sigh

 

I had that. just create another tag attach to the object and then put in the code.

 

Sorry for digging this up but after all these years there's still no way for native support for an object to have a UUID, GUID, id.. etc
You have to create workarounds with an extra script to something extremely common.

(GetInstanceID is not always unique and you can't provide, changing the name is a WORKAROUND)

I've bumped into this issue on every project hoping Unity would finally fix this

 

I mean an object reference is unique, so referencing it in a scene is not hard. If you need a cross scene reference, Unity has an official solution as well, here: https://github.com/Unity-Technologies/guid-based-reference

 

if anyone still has this issue and is wondering why, it might be because you need to open Edit -> Project Settings -> Tag and Layers and set it here so unity can reload it and your script find it . If it still doesnt work it might be good to reload the project so the script finds it .