Unity实现截图功能

本文实例为大家分享了unity实现截图功能的具体代码，供大家参考，具体内容如下

一、使用unity自带api

using unityengine;
using unityengine.ui;
 
public class screenshottest : monobehaviour
{
  public rawimage img;
 
  private void update()
  {
    //使用screencapture.capturescreenshot
    if (input.getkeydown(keycode.a))
    {
      screencapture.capturescreenshot(application.datapath + "/resources/screenshot.jpg");
      img.texture = resources.load<texture>("screenshot");
    }
 
    //使用screencapture.capturescreenshotastexture
    if (input.getkeydown(keycode.s))
    {
      img.texture = screencapture.capturescreenshotastexture(0);
    }
 
    //使用screencapture.capturescreenshotastexture
    if (input.getkeydown(keycode.d))
    {
      rendertexture rendertexture = new rendertexture(720, 1280, 0);
      screencapture.capturescreenshotintorendertexture(rendertexture);
      img.texture = rendertexture;
    }
  }
}

经过测试，使用screencapture.capturescreenshotastexture和screencapture.capturescreenshotastexture截取的都是整个屏幕，相当于手机的截屏，无法自定义截图区域，作用不大。使用screencapture.capturescreenshot会有延迟。

二、通过texture2d.readpixels来读取屏幕区域像素

using unityengine;
using system.collections;
using system;
 
public class screenshottest : monobehaviour
{
  private void update()
  {
    if (input.getkeydown(keycode.a))
    {
      startcoroutine(capturebyrect());
    }
  }
 
  private ienumerator capturebyrect()
  {
    //等待渲染线程结束
    yield return new waitforendofframe();
    //初始化texture2d, 大小可以根据需求更改
    texture2d mtexture = new texture2d(screen.width, screen.height, textureformat.rgb24, false);
    //读取屏幕像素信息并存储为纹理数据
    mtexture.readpixels(new rect(0, 0, screen.width, screen.height), 0, 0);
    //应用
    mtexture.apply();
    //将图片信息编码为字节信息
    byte[] bytes = mtexture.encodetopng();
    //保存(不能保存为png格式)
    string filename = datetime.now.hour + ":" + datetime.now.minute + ":" + datetime.now.second + ".jpg";
    system.io.file.writeallbytes(application.streamingassetspath + "/screenshot/" + filename, bytes);
 
    unityeditor.assetdatabase.refresh();
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。