419 lines
11 KiB
C#
419 lines
11 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading.Tasks;
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/// <summary>
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/// 自动图片轮播器
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/// 支持从本地文件夹加载图片并自动切换
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/// </summary>
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public class AutoImageSlider : MonoBehaviour
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{
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[Header("UI组件")]
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public Image displayImage; // 显示图片的Image组件
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// 记录原始宽高
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private float originWidth;
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private float originHeight;
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public RectTransform panelRectTransform; // 图片容器的RectTransform
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public Text infoText; // 显示信息的文本组件（可选）
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[Header("路径配置")]
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[Tooltip("图片所在的文件夹路径，相对于StreamingAssets文件夹")]
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public string imageFolderPath = "Images";
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[Header("轮播设置")]
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[Tooltip("每张图片显示的时间（秒）")]
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public float slideInterval = 3f;
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[Tooltip("是否自动播放")]
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public bool autoPlay = true;
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[Tooltip("是否循环播放")]
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public bool loop = true;
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[Tooltip("图片切换时的淡入淡出时间")]
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public float fadeDuration = 0.5f;
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[Header("手动控制")]
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[Tooltip("上一张按钮")]
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public Button prevButton;
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[Tooltip("下一张按钮")]
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public Button nextButton;
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[Tooltip("播放/暂停按钮")]
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public Button playPauseButton;
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// 内部变量
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private List<Texture2D> loadedTextures = new List<Texture2D>();
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private List<Sprite> loadedSprites = new List<Sprite>();
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private int currentImageIndex = 0;
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private Coroutine slideCoroutine;
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public bool isPlaying = false;
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void Awake()
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{
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originWidth = displayImage.rectTransform.sizeDelta.x;
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originHeight = displayImage.rectTransform.sizeDelta.y;
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}
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void Start()
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{
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InitializeSlider();
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}
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/// <summary>
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/// 初始化轮播器
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/// </summary>
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private async void InitializeSlider()
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{
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LoadImagesFromFolder();
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await Task.Delay(1000);
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if (loadedSprites.Count > 0)
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{
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ShowImageAtIndex(currentImageIndex);
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SetupButtons();
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if (autoPlay)
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{
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Play();
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}
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}
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else
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{
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Debug.LogError("未找到任何图片文件，请检查路径: " + GetFullImagePath());
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}
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}
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/// <summary>
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/// 从文件夹加载图片
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/// </summary>
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private void LoadImagesFromFolder()
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{
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loadedTextures.Clear();
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loadedSprites.Clear();
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string fullPath = Path.Combine(Application.streamingAssetsPath, imageFolderPath);
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if (!Directory.Exists(fullPath))
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{
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Debug.LogError("图片文件夹不存在: " + fullPath);
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return;
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}
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// 支持的图片格式
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string[] imageExtensions = { "*.png", "*.jpg", "*.jpeg", "*.gif", "*.bmp", "*.tga" };
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foreach (string extension in imageExtensions)
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{
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string[] files = Directory.GetFiles(fullPath, extension);
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foreach (string filePath in files)
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{
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StartCoroutine(LoadImageAtPath(filePath));
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}
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}
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}
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/// <summary>
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/// 在指定路径加载图片
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/// </summary>
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/// <param name="filePath">图片文件路径</param>
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private IEnumerator LoadImageAtPath(string filePath)
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{
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string url = "file://" + filePath;
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using (WWW www = new WWW(url))
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{
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yield return www;
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if (!string.IsNullOrEmpty(www.error))
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{
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Debug.LogError("加载图片失败: " + www.error + " - " + filePath);
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}
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else
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{
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Texture2D texture = www.texture;
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if (texture != null)
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{
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loadedTextures.Add(texture);
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// 创建精灵
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Sprite sprite = Sprite.Create(
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texture,
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new Rect(0, 0, texture.width, texture.height),
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new Vector2(0.5f, 0.5f)
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);
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sprite.name = Path.GetFileNameWithoutExtension(filePath);
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loadedSprites.Add(sprite);
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// 更新UI信息
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UpdateInfoText();
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}
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}
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}
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}
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/// <summary>
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/// 显示指定索引的图片
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/// </summary>
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/// <param name="index">图片索引</param>
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private void ShowImageAtIndex(int index)
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{
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if (loadedSprites.Count == 0) return;
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// 确保索引在有效范围内
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if (index < 0) index = loadedSprites.Count - 1;
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if (index >= loadedSprites.Count) index = 0;
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currentImageIndex = index;
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if (displayImage != null && loadedSprites[currentImageIndex] != null)
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{
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// 应用淡入淡出效果
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StartCoroutine(FadeImage(displayImage, loadedSprites[currentImageIndex]));
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}
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UpdateInfoText();
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}
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/// <summary>
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/// 淡入淡出图片切换效果
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/// </summary>
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/// <param name="image">目标Image组件</param>
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/// <param name="newSprite">新精灵</param>
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private IEnumerator FadeImage(Image image, Sprite newSprite)
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{
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if (fadeDuration <= 0)
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{
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image.sprite = newSprite;
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//image.SetNativeSize();
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//image.rectTransform.sizeDelta = new Vector2(originWidth, originHeight);
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yield break;
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}
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// 淡出
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Color originalColor = image.color;
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float elapsedTime = 0;
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while (elapsedTime < fadeDuration / 2)
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{
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image.color = new Color(originalColor.r, originalColor.g, originalColor.b, 1 - (elapsedTime / (fadeDuration / 2)));
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elapsedTime += Time.deltaTime;
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yield return null;
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}
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// 设置新图片
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image.sprite = newSprite;
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//image.SetNativeSize();
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// 淡入
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elapsedTime = 0;
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while (elapsedTime < fadeDuration / 2)
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{
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image.color = new Color(originalColor.r, originalColor.g, originalColor.b, elapsedTime / (fadeDuration / 2));
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elapsedTime += Time.deltaTime;
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yield return null;
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}
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image.color = originalColor;
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}
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/// <summary>
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/// 下一张图片
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/// </summary>
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public void NextImage()
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{
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if (loadedSprites.Count == 0) return;
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int nextIndex = currentImageIndex + 1;
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if (nextIndex >= loadedSprites.Count)
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{
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nextIndex = loop ? 0 : currentImageIndex; // 如果不循环则停留在最后一张
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}
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ShowImageAtIndex(nextIndex);
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}
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/// <summary>
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/// 上一张图片
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/// </summary>
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public void PreviousImage()
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{
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if (loadedSprites.Count == 0) return;
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int prevIndex = currentImageIndex - 1;
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if (prevIndex < 0)
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{
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prevIndex = loop ? loadedSprites.Count - 1 : 0; // 如果不循环则停留在第一张
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}
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ShowImageAtIndex(prevIndex);
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}
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/// <summary>
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/// 开始播放
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/// </summary>
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public void Play()
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{
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if (isPlaying) return;
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transform.parent.gameObject.SetActive(true);
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if (slideCoroutine != null)
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{
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StopCoroutine(slideCoroutine);
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}
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slideCoroutine = StartCoroutine(AutoSlideRoutine());
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isPlaying = true;
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UpdatePlayPauseButtonText();
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}
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/// <summary>
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/// 暂停播放
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/// </summary>
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public void Pause()
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{
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if (!isPlaying) return;
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if (slideCoroutine != null)
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{
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StopCoroutine(slideCoroutine);
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slideCoroutine = null;
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}
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isPlaying = false;
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transform.parent.gameObject.SetActive(false);
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UpdatePlayPauseButtonText();
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}
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/// <summary>
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/// 自动轮播协程
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/// </summary>
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private IEnumerator AutoSlideRoutine()
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{
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while (true)
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{
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yield return new WaitForSeconds(slideInterval);
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if (isPlaying)
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{
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NextImage();
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}
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}
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}
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/// <summary>
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/// 设置按钮事件
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/// </summary>
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private void SetupButtons()
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{
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if (prevButton != null)
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{
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prevButton.onClick.RemoveAllListeners();
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prevButton.onClick.AddListener(PreviousImage);
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}
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if (nextButton != null)
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{
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nextButton.onClick.RemoveAllListeners();
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nextButton.onClick.AddListener(NextImage);
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}
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if (playPauseButton != null)
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{
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playPauseButton.onClick.RemoveAllListeners();
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playPauseButton.onClick.AddListener(TogglePlayPause);
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}
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}
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/// <summary>
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/// 切换播放/暂停状态
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/// </summary>
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public void TogglePlayPause()
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{
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if (isPlaying)
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{
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Pause();
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}
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else
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{
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Play();
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}
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}
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/// <summary>
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/// 更新播放/暂停按钮文字
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/// </summary>
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private void UpdatePlayPauseButtonText()
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{
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if (playPauseButton != null && playPauseButton.GetComponentInChildren<Text>() != null)
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{
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Text buttonText = playPauseButton.GetComponentInChildren<Text>();
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buttonText.text = isPlaying ? "||" : "▶";
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}
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}
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/// <summary>
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/// 更新信息文本
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/// </summary>
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private void UpdateInfoText()
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{
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if (infoText != null)
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{
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if (loadedSprites.Count > 0)
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{
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infoText.text = $"图片 {currentImageIndex + 1}/{loadedSprites.Count}";
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}
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else
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{
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infoText.text = "无图片";
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}
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}
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}
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/// <summary>
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/// 获取完整图片路径
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/// </summary>
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/// <returns>完整路径</returns>
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private string GetFullImagePath()
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{
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return Path.Combine(Application.streamingAssetsPath, imageFolderPath);
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}
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/// <summary>
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/// 获取当前播放状态
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/// </summary>
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/// <returns>是否正在播放</returns>
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public bool IsPlaying()
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{
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return isPlaying;
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}
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/// <summary>
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/// 获取图片总数
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/// </summary>
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/// <returns>图片总数</returns>
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public int GetImageCount()
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{
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return loadedSprites.Count;
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}
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/// <summary>
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/// 获取当前图片索引
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/// </summary>
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/// <returns>当前图片索引</returns>
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public int GetCurrentImageIndex()
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{
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return currentImageIndex;
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}
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void OnDestroy()
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{
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Pause();
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// 清理加载的纹理
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foreach (Texture2D texture in loadedTextures)
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{
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if (texture != null)
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{
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DestroyImmediate(texture);
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}
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}
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loadedTextures.Clear();
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loadedSprites.Clear();
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}
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} |