Get GameObject dependencies only once for JobComponentSystem

Questions & Answers
1

If I put something like field = UnityEngine.GameObject.Find("ObjectName").transform; in the OnCreate it will throw exception. I’m guessing because this system is being run before the game objects have been set up. I don’t want to have to go find dependencies every time in OnUpdate, so how do I get the dependencies just once? Hoping the answer isn’t a null check in OnUpdate…

2

You can override OnStartRunning in your ComponentSystem. It may get called multiple times, but only when system stops/starts, so should be seldom enough for this purpose.

protected override void OnStartRunning() {
    field = UnityEngine.GameObject.Find("ObjectName").transform;
}

https://docs.unity3d.com/Packages/com.unity.entities@0.4/api/Unity.Entities.ComponentSystemBase.html#Unity_Entities_ComponentSystemBase_OnStartRunning