유니티 C# 페이드 인 페이드아웃 Fade In, Fade Out 간단 사용법

유니티 자체 코드 작성

using UnityEngine;
using System.Collections;

public class FadeInOut : MonoBehaviour
{
    public float fadeSpeed = 1.5f;
    public bool fadeInOnStart = true;
    public bool fadeOutOnExit = true;

    private CanvasGroup canvasGroup;

    void Start()
    {
        canvasGroup = GetComponent<CanvasGroup>();
        if (fadeInOnStart)
        {
            canvasGroup.alpha = 0f;
            StartCoroutine(FadeIn());
        }
    }

    IEnumerator FadeIn()
    {
        while (canvasGroup.alpha < 1)
        {
            canvasGroup.alpha += Time.deltaTime * fadeSpeed;
            yield return null;
        }
    }

    IEnumerator FadeOut()
    {
        while (canvasGroup.alpha > 0)
        {
            canvasGroup.alpha -= Time.deltaTime * fadeSpeed;
            yield return null;
        }
    }
}

 

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Dotween Asset 사용 (무료)

DOTween (HOTween v2) | 애니메이션 도구 | Unity Asset Store

 

도트윈 Dotween 으로 작성

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;

public class FadeInOut : MonoBehaviour
{
    public CanvasGroup canvasGroup;

    void Awake()
    {
        canvasGroup.gameObject.SetActive(false);
    }

    public void FadeIn() //페이드 인 사용
    {
        StartCoroutine(Fade(true));
    }

    public void FadeOut() //페이드 아웃 사용
    {
        StartCoroutine(Fade(false));
    }

    private IEnumerator Fade(bool isFadeIn)
    {
        if (isFadeIn)
        {
            canvasGroup.alpha = 1;
            Tween tween = canvasGroup.DOFade(0f, 1f);
            yield return tween.WaitForCompletion();
            canvasGroup.gameObject.SetActive(false);
        }
        else
        {
            canvasGroup.alpha = 0;
            canvasGroup.gameObject.SetActive(true);
            Tween tween = canvasGroup.DOFade(1f, 1f);
            yield return tween.WaitForCompletion();
            StartCoroutine(Fade(true));
        }
    }
}

 

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참고할만한 글

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