Reply To: Blackboard Variable changed condition

[Gavalakis]

Hello and sorry for the late reply.

I have modified your code to work as I expect you want it to:

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using NodeCanvas.Framework; using ParadoxNotion.Design; using UnityEngine;   namespace Game.Tasks.Conditions {     [Name("On Variable Changed")]     [Category("✫ Blackboard")]     public class BBVariableChanged : ConditionTask     {                [BlackboardOnly]         public BBParameter<object> BBVar;           protected override string info{             get { return BBVar + " Changed."; }         }           protected override string OnInit(){             if (BBVar.isNone){ return "Blackboard Variable not set."; } return null;         }   protected override void OnEnable(){ BBVar.varRef.onValueChanged += OnValueChanged; }           protected override void OnDisable(){ BBVar.varRef.onValueChanged -= OnValueChanged;         }           protected override bool OnCheck(){             return false;         }           private void OnValueChanged(string arg1, object arg2){             YieldReturn(true);         }     } }

Some notes:
– Use OnInit only for initialization similar to Unity’s Awake.
– Use OnEnable and OnDisable to subscribe and unsubscribe.
– You don’t have to call base implementation of methods.
– A BBParameter will never be null. Use .isNone to determine if the front-end user has selected a variable or not.

Let me know if that works for you.
Thanks!

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