Unity实现相机截图功能

using UnityEngine;
using System.IO;
 
/// <summary>
/// 相机截图
/// <para>ZhangYu 2018-07-06</para>
/// </summary>
public class CameraCapture : MonoBehaviour {
 
 // 截图尺寸
 public enum CaptureSize {
  CameraSize,
  ScreenResolution,
  FixedSize
 }
 
 // 目标摄像机
 public Camera targetCamera;
 // 截图尺寸
 public CaptureSize captureSize = CaptureSize.CameraSize;
 // 像素尺寸
 public Vector2 pixelSize;
 // 保存路径
 public string savePath = "StreamingAssets/";
 // 文件名称
 public string fileName = "cameraCapture.png";
 
 #if UNITY_EDITOR
 private void Reset() {
  targetCamera = GetComponent<Camera>();
  pixelSize = new Vector2(Screen.currentResolution.width, Screen.currentResolution.height);
 }
 #endif
 
 /// <summary> 保存截图 </summary>
 /// <param name="camera">目标摄像机</param>
 public void saveCapture() {
  Vector2 size = pixelSize;
  if (captureSize == CaptureSize.CameraSize) {
   size = new Vector2(targetCamera.pixelWidth, targetCamera.pixelHeight);
  } else if (captureSize == CaptureSize.ScreenResolution) {
   size = new Vector2(Screen.currentResolution.width, Screen.currentResolution.height);
  }
  string path = Application.dataPath + "/" + savePath + fileName;
  saveTexture(path, capture(targetCamera, (int)size.x, (int)size.y));
 }
 
 /// <summary> 相机截图 </summary>
 /// <param name="camera">目标相机</param>
 public static Texture2D capture(Camera camera) {
  return capture(camera, Screen.width, Screen.height);
 }
 
 /// <summary> 相机截图 </summary>
 /// <param name="camera">目标相机</param>
 /// <param name="width">宽度</param>
 /// <param name="height">高度</param>
 public static Texture2D capture(Camera camera, int width, int height) {
  RenderTexture rt = new RenderTexture(width, height, 0);
  rt.depth = 24;
  rt.antiAliasing = 8;
  camera.targetTexture = rt;
  camera.RenderDontRestore();
  RenderTexture.active = rt;
  Texture2D texture = new Texture2D(width, height, TextureFormat.ARGB32, false, true);
  Rect rect = new Rect(0, 0, width, height);
  texture.ReadPixels(rect, 0, 0);
  texture.filterMode = FilterMode.Point;
  texture.Apply();
  camera.targetTexture = null;
  RenderTexture.active = null;
  Destroy(rt);
  return texture;
 }
 
 /// <summary> 保存贴图 </summary>
 /// <param name="path">保存路径</param>
 /// <param name="texture">Texture2D</param>
 public static void saveTexture(string path, Texture2D texture) {
  File.WriteAllBytes(path, texture.EncodeToPNG());
  #if UNITY_EDITOR
  Debug.Log("已保存截图到:" + path);
  #endif
 }
 
}

using UnityEditor;
using UnityEngine;
 
/// <summary>
/// 相机截图 编辑器
/// <para>ZhangYu 2018-07-06</para>
/// </summary>
[CanEditMultipleObjects]
[CustomEditor(typeof(CameraCapture))]
public class CameraCaptureEditor : Editor {
 
 public override void OnInspectorGUI() {
  // 属性
  CameraCapture script = (CameraCapture)target;
  int selected = (int)script.captureSize;
 
  // 重绘GUI
  EditorGUI.BeginChangeCheck();
  drawProperty("targetCamera", "目标像机");
  string[] options = new string[] { "像机尺寸", "屏幕尺寸", "固定尺寸"};
  selected = EditorGUILayout.Popup("截图尺寸", selected, options, GUILayout.ExpandWidth(true));
  script.captureSize = (CameraCapture.CaptureSize)selected;
  if (script.captureSize == CameraCapture.CaptureSize.FixedSize) {
   drawProperty("pixelSize", "像素尺寸");
   EditorGUILayout.HelpBox("请保持正确的宽高比！\n否则截图区域可能出现错误。", MessageType.Info);
  }
  drawProperty("savePath", "保存路径");
  drawProperty("fileName", "文件名称");
 
  // 保存截图按钮
  bool isPress = GUILayout.Button("保存截图", GUILayout.ExpandWidth(true));
  if (isPress) script.saveCapture();
  if (EditorGUI.EndChangeCheck()) serializedObject.ApplyModifiedProperties();
 }
 
 private void drawProperty(string property, string label) {
  EditorGUILayout.PropertyField(serializedObject.FindProperty(property), new GUIContent(label), true);
 }
 
}