rabidus-test/Assets/Scripts/UIPanel.cs

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

public class UIPanel : MonoBehaviour
{
    public bool HideOnStart = true;
    public bool UseScale = true;
    public float ScaleTime = 0.5f;

    private CanvasGroup canvasGroup;

    private void Awake()
    {
        canvasGroup = GetComponent<CanvasGroup>();
    }

    private void Start()
    {
        if (HideOnStart)
        {
            canvasGroup.alpha = 0;
            canvasGroup.blocksRaycasts = false;
        }
    }

    public void ShowPanel()
    {
        if (UseScale) 
        {
            gameObject.transform.localScale = Vector3.zero;
            gameObject.LeanScale(Vector3.one, 0.5f);
        }
        
        canvasGroup.alpha = 1;
        canvasGroup.blocksRaycasts = true;
    }

    public void HidePanel()
    {
        if (UseScale)
        {
            gameObject.transform.localScale = Vector3.one;
            gameObject.LeanScale(Vector3.zero, 0.5f).setOnComplete(() =>
            {
                canvasGroup.alpha = 0;
                canvasGroup.blocksRaycasts = false;
            });
        }
        else
        {
            canvasGroup.alpha = 0;
            canvasGroup.blocksRaycasts = false;
        }
    }
}