Unity相机画面截图

将ScreenshotHandler.cs挂载到某个相机，需要截图时调用TakeScreenshot_static即可。

ScreenshotHandler.TakeScreenshot_static(600,1080);       

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

public class ScreenshotHandler : MonoBehaviour {
    private static ScreenshotHandler instance;
    private Camera myCamera;
    private bool takeScreenshotOnNextFrame;

    private void Awake()
    {
        instance = this;
        myCamera = GetComponent();
    }

    private void OnPostRender()
    {
        if(takeScreenshotOnNextFrame)
        {
            takeScreenshotOnNextFrame = false;
            RenderTexture renderTexture = myCamera.targetTexture;

            Texture2D renderResult = new Texture2D(renderTexture.width, renderTexture.height, TextureFormat.ARGB32, false);
            Rect rect = new Rect(0, 0, renderTexture.width, renderTexture.height);
            renderResult.ReadPixels(rect, 0, 0);

            byte[] byteArray = renderResult.EncodeToPNG();

            string file = Application.dataPath + "/CameraScreenShot.png";
            Debug.Log(file);
            System.IO.File.WriteAllBytes(file, byteArray);

            RenderTexture.ReleaseTemporary(renderTexture);
            myCamera.targetTexture = null;
        }
    }

    private void TakeScreenshot(int widht, int height)
    {
        myCamera.targetTexture = RenderTexture.GetTemporary(widht, height, 16);
        takeScreenshotOnNextFrame = true;
    }

    public static void TakeScreenshot_static(int width, int height)
    {
        instance.TakeScreenshot(width, height);
    }
}