文章中主要参考了 http://blog.csdn.net/anyuanlzh/article/details/17008909;
对其中还有 一些疑惑:就是 如果相机有天空盒 就无法截取到3D物体 比如Cube 等
Camera :主要对物体进行截取 Clear Flags 不选择 天空盒
Camera2: 主要对UI进行截取
using UnityEngine; using System.Collections; public class Screenshot : MonoBehaviour { public Camera mainCamera; public Camera uiCamera; /// <summary> /// 对相机截图。 /// </summary> /// <returns>The screenshot2.</returns> /// <param name="camera">Camera.要被截屏的相机</param> /// <param name="rect">Rect.截屏的区域</param> Texture2D CaptureCamera(Camera camera, Camera camera2 ,Rect rect) { // 创建一个RenderTexture对象 RenderTexture rt = new RenderTexture((int)rect.width, (int)rect.height, -1); // 临时设置相关相机的targetTexture为rt, 并手动渲染相关相机 camera.targetTexture = rt; camera.Render(); //ps: --- 如果这样加上第二个相机,可以实现只截图某几个指定的相机一起看到的图像。 camera2.targetTexture = rt; camera2.Render(); //ps: ------------------------------------------------------------------- // 激活这个rt, 并从中中读取像素。 RenderTexture.active = rt; Texture2D screenShot = new Texture2D((int)rect.width, (int)rect.height, TextureFormat.RGB24, false); screenShot.ReadPixels(rect, 0, 0);// 注:这个时候,它是从RenderTexture.active中读取像素 screenShot.Apply(); // 重置相关参数,以使用camera继续在屏幕上显示 camera.targetTexture = null; camera2.targetTexture = null; RenderTexture.active = null; // JC: added to avoid errors GameObject.Destroy(rt); // 最后将这些纹理数据,成一个png图片文件 byte[] bytes = screenShot.EncodeToPNG(); string filename = Application.dataPath + "/Screenshot.png"; System.IO.File.WriteAllBytes(filename, bytes); Debug.Log(string.Format("截屏了一张照片: {0}", filename)); return screenShot; } void OnGUI() { if (GUILayout.Button("AAAA")) { CaptureCamera(mainCamera, uiCamera,new Rect(0, 0, Screen.width, Screen.height)); } } }