Unity执行程序内快照

参考文档：http://blog.csdn.net/qq_24807077/article/details/79555557

主要的API：
//将IO数据写入
File.WriteAllBytes(path + "/" + count.ToString() + ".png", bytes);
//数据格式转换为二进制
var bytes = tex.EncodeToPNG();
// 读取屏幕数据
picture.ReadPixels(
new Rect(0,0,Screen.width,Screen.height),0,0
);

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;

public class ScreenShot : MonoBehaviour {
    public float ScreenShotHeight=500;
    public float ScreenShotWith=500;
    public string PicSavePath = "MyPhoto";


    [SerializeField]
    private Texture2D picture;
    private RenderTexture renderBuffer;
    private string Path = "";
    private bool IsShot=false;
    // Use this for initialization
    void Start () {
        picture = new Texture2D(Screen.width,Screen.height,TextureFormat.RGBA32,false,true);        
        Path = Application.dataPath + "/"+ PicSavePath;
        //Debug.LogError(Path);
        if (Directory.Exists(Path))
        {
            FileAttributes attr = File.GetAttributes(Path);
            if (attr == FileAttributes.Directory)            
                Directory.Delete(Path, true);            
            else          
                File.Delete(Path);            
        }
        if (!Directory.Exists(Path))      
            Directory.CreateDirectory(Path);
       
    }
	
	// Update is called once per frame
	void Update () {
        if (Input.GetKeyDown(KeyCode.Space)&&!IsShot)
            ShotScreen();

    }

   
    public void ShotScreen()
    {
        IsShot = true;
        StartCoroutine(CaptureScreen());
    }
    private static int count = 0;
   
    public IEnumerator CaptureScreen()
    {
        yield return new WaitForEndOfFrame();
        picture.ReadPixels(
            new Rect(0,0,Screen.width,Screen.height),0,0
            );

        picture.Apply();
        var bytes = picture.EncodeToPNG();
        File.WriteAllBytes(Path + "/" + count.ToString() + ".png", bytes);
        count++;
        Debug.Log("Fin the work gender texture");

        yield return new WaitForSeconds(0.1f);
        IsShot = false;
    }
}