Activate/Deactivate Game Objects through buttons

Working on Transform component and through SetActiveInHierarchy, I solved the problem. Here's the script: at runtime, I generate my own HUD plus I add an event on all buttons, turning on and off the game object representing the weapons available to the player:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 using TMPro;
 
 public class WeaponHandlerScript : MonoBehaviour {
 
     public Transform weaponPanel;
     public Transform selectPanel;
     public Transform[] selectChildren;
     public GameObject[] weapons;
     public Button[] butts;
 
     public Button theButt;
     public Transform[] childrenButt;
     private float buttPos;
     private float buttPosTemp;
     private Vector2 panelSize;
     private Vector2 panelSizeTemp;
 
     public string theName;
     // public 
     // Use this for initialization
     void Start () {
         weaponPanel = GameObject.FindGameObjectWithTag ("WeaponPanel").transform;
         selectPanel = GameObject.FindGameObjectWithTag ("SelectPanel").transform;
         selectChildren = selectPanel.GetComponentsInChildren<Transform> ();
         weapons = GameObject.FindGameObjectsWithTag ("WeaponSpawn");
         butts = weaponPanel.GetComponentsInChildren<Button> ();
         theButt = butts [0];
 
         if (weapons.Length == 0)
             return;
         // childrenButt[1] = the image; childrenButt[2] = selector
         // childrenButt = theButt.GetComponentsInChildren<Transform> ();
 
         buttPos = theButt.GetComponent<RectTransform> ().anchoredPosition.x;
 
         panelSize = weaponPanel.GetComponent<RectTransform> ().sizeDelta;
 
         for (int i = 0; i < weapons.Length - 1; i++) {
             panelSizeTemp = new Vector2 (panelSize.x + 43f, panelSize.y);
             panelSize = panelSizeTemp;
             weaponPanel.GetComponent<RectTransform> ().sizeDelta = panelSize;
 
             Button goButton = Instantiate (theButt) as Button;
             goButton.name = "ButtonWeapon" + (i+1);
             goButton.transform.SetParent(weaponPanel, false);
             goButton.transform.localScale = new Vector3 (1, 1, 1);
 
             RectTransform rectButt = goButton.GetComponent<RectTransform> ();
             rectButt.anchorMax = new Vector2 (0, 0.5f);
             rectButt.anchorMin = new Vector2 (0, 0.5f);
             buttPosTemp = buttPos + 45f;
             buttPos = buttPosTemp;
             rectButt.anchoredPosition = new Vector2 (buttPosTemp, 0);
 
         }
 
         butts = weaponPanel.GetComponentsInChildren<Button> ();
         selectChildren [1].GetComponent<Image> ().sprite = weapons [0].GetComponent<GenericWeapon> ().img;
         theName = weapons [0].GetComponent<GenericWeapon> ().nameWeap;
         selectChildren [2].GetComponent<TextMeshProUGUI> ().text = GameManagerScript.GetInstance ().GetAmmo (theName).ToString();
 
         for (int i = 0; i < butts.Length; i++) {
             Transform[] childrenButt = butts [i].GetComponentsInChildren<Transform> ();
 
             if (i == 0) {
                 weapons [i].SetActive (true);
                 childrenButt [2].gameObject.SetActive (true);
             }
             else {
                 weapons [i].SetActive (false);
                 childrenButt [2].gameObject.SetActive (false);
             }
             
             childrenButt [1].GetComponent<Image> ().sprite = weapons [i].GetComponent<GenericWeapon> ().img;
             AddEvent (butts, butts [i], weapons [i].name, weapons, selectChildren[1], selectChildren[2]);
         }
     }
 
     void Update () {
         for (int i = 0; i < weapons.Length; i++) {
             
             string weapAmmos;
 
             if (weapons [i].activeInHierarchy) {
                 weapAmmos = weapons [i].GetComponent<GenericWeapon> ().nameWeap;
                 selectChildren [2].GetComponent<TextMeshProUGUI> ().text = GameManagerScript.GetInstance ().GetAmmo (weapAmmos).ToString ();
             }
         }
     }
 
     void AddEvent(Button[] buttons, Button button, string weapon, GameObject[] weapons, Transform select, Transform textWeapon) {
         button.gameObject.AddComponent(typeof(EventTrigger));
         EventTrigger trigger = button.gameObject.GetComponent<EventTrigger>();
         EventTrigger.Entry entry = new EventTrigger.Entry();
         entry.eventID = EventTriggerType.PointerClick;
         entry.callback.AddListener( (eventData) => { 
         
             string weapToInsert = null;
 
             for (int i = 0; i < weapons.Length; i++) {
                 if (weapon != weapons[i].name) {
                     weapons[i].SetActive(false);    
                 }
                 else {
                     weapons[i].SetActive(true);
                     select.GetComponent<Image> ().sprite = weapons[i].GetComponent<GenericWeapon>().img;
                     weapToInsert = weapons[i].GetComponent<GenericWeapon>().nameWeap;
                 }
             }
 
             for (int j = 0; j < buttons.Length; j++) {
 
                 Transform[] selector = buttons[j].GetComponentsInChildren<Transform> (true); 
 
                 if (button.name != buttons[j].name) 
                     selector[2].gameObject.SetActive(false);
                 else
                     selector[2].gameObject.SetActive(true);
                     textWeapon.GetComponent<TextMeshProUGUI>().text = GameManagerScript.GetInstance ().GetAmmo (weapToInsert).ToString();
             }
         });
         trigger.triggers.Add(entry);
     }
 }