access child of a gameobject

Questions & Answers
1

I am using instantiate() to clone a gameobject and have stored the cloned gameobject in a variable named rocketInstance.This new gameObject have three children named marker,starter and plane. I want to store the marker gameObject in a variable named trrigerObject. I have tried the following
trrigerObject=rocketInstance.marker; trrigerObject=rocketInstance.GetComponent(“marker”);`

5

Easiest way would be : Get Child transform using its index , and then get GameObject of that child transform:

GameObject  ChildGameObject1 = ParentGameObject.transform.GetChild (0).gameObject;
GameObject  ChildGameObject2 = ParentGameObject.transform.GetChild (1).gameObject;

And so on …

4

Try Transform.Find or GetComponentInChildren

6
2

I would attach a script to your marker gameobject like so:

// C#

public GameObject myMarker;

void Start()
{
    marker = this.gameObject;
}

// JS

var myMarker : GameObject;

function Start()
{
    marker = this.gameObject;
}

Making it public means other scripts can now access this gameobject.

3

just use this.trrigerObject must be GameObject variable

trrigerObject=rocketInstance.GetChild("marker");
7

for heaven sake, there is not any get sub child by name or by tag, what if I have many sub children

8

I have this little extension that isn’t efficient at all, but does do what you’re expecting.

using UnityEngine;
using System.Collections;

public static class ExtensionMethods {
    public static GameObject FindChildByName(this GameObject target, string name) {
        if (target.name == name) return target;
        for (int i = 0; i < target.transform.childCount; ++i) {
            var result = FindChildByName(target.transform.GetChild(i).gameObject, name);
            if (result != null) return result;
        }
        return null;
    }
}

You would use it like:

using UnityEngine;
using System.Collections;

public class ExampleScript : MonoBehaviour {
    private GameObject parentObject;  // set in inspector
    void Update() {
        GameObject childObject = parentObject.FindChildByName("ChildGameObjectName");
        if (childObject != null) {
            Debug.Log("Found Child:" + childObject.name);
        }
    }
}

Maybe this will help someone in the future?