ProjectDDD/Assets/_DDD/_Scripts/GameFramework/FadeManager.cs

using System.Threading.Tasks;
using DG.Tweening;
using UnityEngine;

namespace DDD
{
    public class FadeManager : Singleton<FadeManager>, IManager
    {
        [SerializeField]
        private float _fadeOutDuration = 0.5f;
        
        [SerializeField]
        private float _fadeInDuration = 1f;
        
        private CanvasGroup _canvasGroup;

        public void PreInit()
        {
            _canvasGroup = GetComponent<CanvasGroup>();
        }

        public Task Init()
        {
            return Task.CompletedTask;;
        }

        public void PostInit()
        {
            _canvasGroup.alpha = 0f;
            _canvasGroup.gameObject.SetActive(false);
        }
        
        public async Task FadeOut()
        {
            _canvasGroup.gameObject.SetActive(true);
            _canvasGroup.blocksRaycasts = true;

            await _canvasGroup.DOFade(1f, _fadeOutDuration)
                .SetUpdate(true)
                .AsyncWaitForCompletion();
        }

        public async Task FadeIn()
        {
            await _canvasGroup.DOFade(0f, _fadeInDuration)
                .SetUpdate(true)
                .AsyncWaitForCompletion();

            _canvasGroup.blocksRaycasts = false;
            _canvasGroup.gameObject.SetActive(false);
        }

        public async Task FadeOutIn()
        {
            await FadeOut();
            await FadeIn();
        }
    }
}