using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System;
public class ButtonContent : MonoBehaviour{
     public Button btn;
     void Start(){
         btn = GameObject.Find("填寫(xiě)button名").getComponent<Button>(); //-----------(1)
         Text text = btn.transform.Find("Text").getComponent<Text>(); //------------(2)
         //或者吧（1）（2）合并成：
         //  Text text = GameObject.Find("填寫(xiě)button名/Text").getComponent<Text>();
         Debug.Log(text.text.toString());
         //其實(shí)就一條語(yǔ)句
  //     Debug.Log(GameObject.Find("填寫(xiě)button名/Text").getComponent<Text>().text.toString());
     }
}

Text/Button compo=GameObject.Find("任意button/text節(jié)點(diǎn)名稱(chēng)").GetComponent();

Text text = gameobject.transform.Find("Text名稱(chēng)").GetComponent();

using UnityEngine.UI;
using UnityEngine.EventSystems;
using UnityEngine;
public class btn1 : MonoBehaviour
{
    // Start is called before the first frame update
   public Button btn;
    void Start()
    {
    }
    // Update is called once per frame
    void Update()
    {
        GameObject go = GameObject.Find("Butt");
        Text text=go.GetComponentInChildren<Text>();
        text.text="天桑在玩CSGO";
        Debug.Log(text.text);
    }
}

 GameObject go = GameObject.Find("Butt");
        Button button=go.GetComponent<Button>();
        if(button)Debug.Log("找到這個(gè)按鈕了!");