Question by Addyarb · Nov 24, 2015 at 12:35 PM · prefab prefabutility

Prefab Interference?

Greetings!

I'm having issues with my prefab being overwritten by another prefab in the same scene.

So what's going on here? I have a prefab called "Audio System" and another called "Player."

Each time I run the game, everything works fine. But then after I stop it, or randomly some time thereafter, the "Audio System" prefab turns red (loses connection?) and then the actual "Audio System" prefab in my prefabs folder is replaced by the player.

Here's the code I'm using to save the changes to Audio System.

This question could also be read as....

What is the proper way to save ALL changes to a prefab via code?

I'm looking for something like :

 PrefabUtility.GetPrefab("AudioSystem").ApplyChanges();

Thank you!

     void UpdateAudioSystemValues ()
     {
         //Create an empty prefab with the same values as our current one, and then replace our old one with the new one.
         AudioSystem ASYSTEM = FindObjectOfType(typeof(AudioSystem)) as AudioSystem;
         Transform AS_Transform = ASYSTEM.transform;
         UnityEngine.Object prefab = PrefabUtility.CreateEmptyPrefab("Assets/AudioSystem/Resources/Prefabs/AudioSystem/AudioSystem.prefab");
         PrefabUtility.ReplacePrefab(AS_Transform.gameObject, prefab, ReplacePrefabOptions.ConnectToPrefab);
     }

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_dns_ · Nov 24, 2015 at 03:25 PM 0

Hi, I'm not sure I understand exactly what you want to do (editor code ? game running into the editor ?)

A simple way to edit prefab values by script is to have an object in the scene that holds a reference to a prefab: i.e. a $$anonymous$$anager object have a "public AudioSystem $$anonymous$$yAudioPrefab" that is assigned in the editor to the prefab that needs modifications (using drag & drop). Then, during the game or in editor code, just modify this object using "$$anonymous$$yAudioPrefab.property = value", then, after the modifications, call EditorUtility.SetDirty($$anonymous$$yAudioPrefab). Then you just have to save the scene (or stop the game and then save) to save modifications to the prefab.

How it works is that when an object has a reference to a prefab, Unity will create an instance of this prefab when the scene loads. This allows you to modify this instance as you want, then, using SetDirty(), you tell Unity to reflect those changes back to the prefab asset on the disc.