Unity中通过通过回调找对象的方法

using UnityEngine;
using System.Collections;

public class FindObjectTool {

    private static FindObjectTool instance;
    public static FindObjectTool GetInstance(){
        if(instance==null){
            instance=new FindObjectTool();
        }
        return instance;
    }

    public Transform FindObjectByName(Transform trans,string name){
        for(int i=0;i<trans.childCount;i++){
            if(trans.GetChild(i).name!=name){
                var child=FindObjectByName(trans.GetChild(i),name);
                if(child!=null){
                    return child;
                }
            }
            else{
                return trans.GetChild(i);
            }
        }
        return null;
    }
}