How to get all child objects under an object in Unity

方法1（Get all child objects,regardless of child objectsSetActive是否为true）：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Test : MonoBehaviour
{
    
     public List<GameObject> CH = new List<GameObject>();//A list of stored objects
    
    public Material Dissolve;
    // Start is called before the first frame update
    void Start()
    {
    
        FindChild(this.gameObject);//Find all child objects under the node

        DoDissolve();
    }
    void FindChild(GameObject child)
    {
    




        //利用for循环 Get all child objects under the object
        for (int c = 0; c < child.transform.childCount; c++)
        {
    
            //If there are sub-objects under the sub-object Just pass in the child object for callback lookup until the object has no children
            if (child.transform.GetChild(c).childCount > 0)
            {
    
                FindChild(child.transform.GetChild(c).gameObject);

            }
            CH.Add(child.transform.GetChild(c).gameObject);


        }
    }
}

After getting all child objects,可通过listList batches of objects;
Components such as adding or removing its children,Determine whether its child object has a component and so on.
方法二（推荐）：

transform.GetComponentsInChildren<Transform>(); //无法获取SetActive为false的子物体
transform.GetComponentsInChildren<Transform>(true); //Get all child objects,无论SetActive是否为true

该方法为Unity内置的API,All components of the corresponding type under the object will be found;
（注意：This method will find itselfTransform）