unity 截图并且展现在UI中

using UnityEngine;
using UnityEngine.UI;
using System.IO;
using System.Collections.Generic;
using System;
using System.Collections;public class ScreenshotManager : MonoBehaviour
{[Header("UI 设置")]public RawImage latestScreenshotDisplay; // 显示最新截图public Transform screenshotListContainer; // 存放历史截图的父物体（如 ScrollView Content）public GameObject screenshotThumbnailPrefab; // 截图缩略图 Prefabprivate string screenshotFolder;private List<Texture2D> screenshotTextures = new List<Texture2D>();void Start(){screenshotFolder = Path.Combine(Application.persistentDataPath, "Screenshots");Directory.CreateDirectory(screenshotFolder);// 加载之前保存的截图（可选）LoadExistingScreenshots();}void Update(){if (Input.GetKeyDown(KeyCode.F1)){CaptureScreenshot();}}public void CaptureScreenshot(){StartCoroutine(TakeScreenshotCoroutine());}private IEnumerator TakeScreenshotCoroutine(){yield return new WaitForEndOfFrame();// 1. 截取屏幕Texture2D screenshotTexture = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);screenshotTexture.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);screenshotTexture.Apply();// 2. 保存到文件string fileName = $"Screenshot_{DateTime.Now:yyyyMMdd_HHmmss}.png";string filePath = Path.Combine(screenshotFolder, fileName);byte[] bytes = screenshotTexture.EncodeToPNG();File.WriteAllBytes(filePath, bytes);// 3. 存储到列表screenshotTextures.Add(screenshotTexture);// 4. 更新 UIUpdateScreenshotUI(screenshotTexture);Debug.Log($"截图已保存: {filePath}");}private void UpdateScreenshotUI(Texture2D newScreenshot){// 显示最新截图if (latestScreenshotDisplay != null){latestScreenshotDisplay.texture = newScreenshot;latestScreenshotDisplay.SetNativeSize();}// 添加到历史列表（生成缩略图）if (screenshotListContainer != null && screenshotThumbnailPrefab != null){GameObject thumbnailObj = Instantiate(screenshotThumbnailPrefab, screenshotListContainer);RawImage thumbnailImage = thumbnailObj.GetComponent<RawImage>();if (thumbnailImage != null){thumbnailImage.texture = newScreenshot;}}}// 加载已存在的截图（可选）private void LoadExistingScreenshots(){string[] files = Directory.GetFiles(screenshotFolder, "*.png");foreach (string file in files){byte[] fileData = File.ReadAllBytes(file);Texture2D texture = new Texture2D(2, 2);texture.LoadImage(fileData); // 自动调整尺寸screenshotTextures.Add(texture);UpdateScreenshotUI(texture);}}
}

创建 ScrollView（用于显示历史截图列表）：

右键 Hierarchy → UI → ScrollView。

调整大小，确保能容纳多个缩略图。

创建缩略图 Prefab：

右键 Hierarchy → UI → RawImage（命名为 ScreenshotThumbnail）。

调整大小（如 200x200），并添加 Button 组件（方便点击查看大图）。

将其拖入 Resources 文件夹或直接拖到 screenshotThumbnailPrefab 字段。

配置脚本参数：

latestScreenshotDisplay → 拖入一个 RawImage（用于显示最新截图）。

screenshotListContainer → 拖入 ScrollView/Content。

screenshotThumbnailPrefab → 拖入你的缩略图 Prefab。

下面代码是可以按下F1不停保存截图，按下A键后一次生成

using UnityEngine;
using UnityEngine.UI;
using System.IO;
using System.Collections.Generic;
using System;
using System.Collections;
using System.Linq;public class ScreenshotManager : MonoBehaviour
{[Header("UI 设置")]public RawImage latestScreenshotDisplay; // 显示最新截图public Transform screenshotListContainer; // 存放历史截图的父物体（如 ScrollView Content）public GameObject screenshotThumbnailPrefab; // 截图缩略图 Prefabprivate string screenshotFolder;private List<string> screenshotPaths = new List<string>(); // 改为存储文件路径void Start(){screenshotFolder = Path.Combine(Application.persistentDataPath, "Screenshots");Directory.CreateDirectory(screenshotFolder);}void Update(){if (Input.GetKeyDown(KeyCode.F1)){CaptureScreenshot();}if (Input.GetKeyDown(KeyCode.A)){LoadAllScreenshotsToUI();}}public void CaptureScreenshot(){StartCoroutine(TakeScreenshotCoroutine());}private IEnumerator TakeScreenshotCoroutine(){yield return new WaitForEndOfFrame();// 1. 截取屏幕Texture2D screenshotTexture = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);screenshotTexture.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);screenshotTexture.Apply();// 2. 保存到文件string fileName = $"Screenshot_{DateTime.Now:yyyyMMdd_HHmmss}.png";string filePath = Path.Combine(screenshotFolder, fileName);byte[] bytes = screenshotTexture.EncodeToPNG();File.WriteAllBytes(filePath, bytes);// 3. 添加到路径列表（不立即显示UI）screenshotPaths.Add(filePath);// 4. 释放纹理内存Destroy(screenshotTexture);Debug.Log($"截图已保存: {filePath}");}private void LoadAllScreenshotsToUI(){// 1. 清空现有UIforeach (Transform child in screenshotListContainer){Destroy(child.gameObject);}// 2. 获取所有截图文件并按时间排序var allScreenshots = Directory.GetFiles(screenshotFolder, "*.png").OrderBy(f => new FileInfo(f).CreationTime).ToList();// 3. 加载并显示所有截图StartCoroutine(LoadAndDisplayScreenshots(allScreenshots));}private IEnumerator LoadAndDisplayScreenshots(List<string> paths){foreach (string filePath in paths){// 1. 加载图片文件byte[] fileData = File.ReadAllBytes(filePath);Texture2D texture = new Texture2D(2, 2);texture.LoadImage(fileData);// 2. 创建UI元素GameObject thumbnailObj = Instantiate(screenshotThumbnailPrefab, screenshotListContainer);RawImage thumbnailImage = thumbnailObj.GetComponent<RawImage>();if (thumbnailImage != null){thumbnailImage.texture = texture;}// 3. 如果是最后一个截图，显示在大图预览if (paths.Last() == filePath && latestScreenshotDisplay != null){latestScreenshotDisplay.texture = texture;latestScreenshotDisplay.SetNativeSize();}yield return null; // 分帧加载避免卡顿}}
}