44 lines
1016 B
C#
44 lines
1016 B
C#
using UnityEngine;
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using UnityEngine.UI;
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using System.Collections;
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public class FadeToBlack : MonoBehaviour
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{
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public float fadeDuration = 1.5f; // 渐变时间
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private Image blackImage;
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void Start()
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{
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blackImage = GetComponent<Image>();
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}
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// 外部调用：渐变变黑
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public void StartFade()
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{
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StartCoroutine(FadeToBlackCoroutine());
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}
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// 外部调用：直接变黑
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public void InstantBlack()
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{
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blackImage.color = new Color(0, 0, 0, 1f); // 设置为全黑
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}
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// 协程：控制渐变过程
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private IEnumerator FadeToBlackCoroutine()
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{
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float elapsedTime = 0f;
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while (elapsedTime < fadeDuration)
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{
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elapsedTime += Time.deltaTime;
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float alpha = Mathf.Clamp01(elapsedTime / fadeDuration); // 计算透明度
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blackImage.color = new Color(0, 0, 0, alpha);
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yield return null; // 等待下一帧
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}
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// 确保最终完全变黑
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blackImage.color = new Color(0, 0, 0, 0.6f);
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}
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} |