unity 针对相机视角截屏并保存

挂在相机上,设置组件属性: Clear Flags 为: Depth only/Solid Color/Don’t Clear

using UnityEngine;
using System.Collections;
using System;
using System.IO;
public class CaptrueCameraScript : MonoBehaviour
{
        public static string pic_fileName;
        public UITexture smallTex;
        /// 

        /// 对相机截屏,并保存
        /// 
        /// The camera.
        /// Camera.
        /// Rect.
        public Texture2D CaptrueCamera (Camera camera, Rect rect)
        {
                // 创建一个RenderTexture对象  
                RenderTexture rt = new RenderTexture ((int)rect.width, (int)rect.height, 0);  
                // 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 ();  
                // 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;  
                //ps: camera2.targetTexture = null;  
                RenderTexture.active = null; // JC: added to avoid errors  
                GameObject.Destroy (rt);
                string formatType = ".png";
                string formatTime = DateTime.Now.ToString ();
                formatTime = formatTime.Replace ('/', '-').Replace (' ', '-').Replace (':', '-').ToString ();
                // 最后将这些纹理数据，成一个png图片文件  
                byte[] bytes = screenShot.EncodeToPNG ();
                string filename = null;
                #if UNITY_ANDROID
                    filename = Application.persistentDataPath + "/" + formatTime + formatType;
        Debug.Log("android!");
                #elif UNITY_IPHONE
                    filename = Application.persistentDataPath + "/" + formatTime + formatType;
        Debug.Log("ios");
                #elif UNITY_EDITOR
                    filename = Application.dataPath + "/" + formatTime + formatType;
        Debug.Log("editor");
                #endif
                System.IO.File.WriteAllBytes (filename, bytes);  
                Debug.Log (string.Format ("截屏了一张照片: {0}", filename));  

                return screenShot;  
        }
        private IEnumerator ReadFileLoadTex ()
        {
                yield return 0;
                string path = null;
                #if UNITY_ANDROID
                    path=Application.persistentDataPath+"/"+pic_fileName;
                #elif UNITY_IPHONE
                    path=Application.persistentDataPath+"/"+pic_fileName;
                #elif UNITY_EDITOR
                    path=Application.dataPath+"/"+pic_fileName;
                #endif
                FileStream fs = new FileStream (path, FileMode.Open, FileAccess.Read);
                fs.Seek (0, SeekOrigin.Begin);
                //创建文件长度缓存
                byte[] bytes = new byte[fs.Length];
                //读取文件
                fs.Read (bytes, 0, (int)fs.Length);
                //释放文件读取流
                fs.Close ();
                fs.Dispose ();
                fs = null;

                //创建texture
                Texture2D tex = new Texture2D (Screen.width, Screen.height, TextureFormat.RGB24, false);
                tex.LoadImage (bytes);
//      图片赋值
//              GameObject.Find ("UI Root/Texture").GetComponent ().mainTexture = tex;
//              GameObject.Find ("Canvas/RawImage").GetComponent ().texture = tex;
        }

}