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Question by TheTrueBlueSonicFan · Sep 01, 2017 at 06:21 AM · parentchildren

How do you get a parent gameObject to read script from their children?

Hey

I'm new to Unity and am trying to get a parent gameObject to change a bool ONLY in their child gameObject since there will be multiple copies of the parent and child gameObjects. How would I do that?

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Answer by GizmoKaracho · Sep 01, 2017 at 07:16 AM

Method#1: Declare your child explicitly in Editor

 public class MyParent: MonoBehaviour{
   public MyScriptClass child; // drag child-GO/component into slot in editor
 
   void Update(){ // or any other method
      child.myBool = true;
   }
 }

Method#2: Call GetComponent on parent

 (...)
 
 
 void Start(){  // if you will change it frequently set it on start
   myChild = gameObject.GetComponentInChildren<MyChildClass>();
 }
 
 void Update(){
   // if set in Start() Method
   myChild.myBool = true;
   
   // if set dynamically
   gameObject.GetComponentInChildren<MyChildClass>().myBool = true;
 }

If you use method#1 you should save your GameObject as a Prefab, so every instance has it's own child already set in the editor.

Method#2 requires that the parent has only ONE Component of that type in your Child GameObjects, otherwise you'll just get the first found match returned.

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Answer by $$anonymous$$ · Sep 01, 2017 at 06:47 AM

Something like:

 var childScript = gameObject.GetComponentInChildren<YourScript>();

https://docs.unity3d.com/ScriptReference/GameObject.GetComponentInChildren.html

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