更多精彩分享：http://blog.csdn.net/u010229677

3.1版本：

在Director里面增加一个函数：

bool Director::saveScreenshot(const std::string& fileName,const std::function<void(const std::string&)>& callback) 
{
	Image::Format format;  
	//进行后缀判断  
	if(std::string::npos != fileName.find_last_of(".")){  
		auto extension = fileName.substr(fileName.find_last_of("."),fileName.length());  
		if (!extension.compare(".png")) {  
			format = Image::Format::PNG;  
		} else if(!extension.compare(".jpg")) {  
			format = Image::Format::JPG;  
		} else{  
			CCLOG("cocos2d: the image can only be saved as JPG or PNG format");  
			return false;  
		}  
	} else {  
		CCLOG("cocos2d: the image can only be saved as JPG or PNG format");  
		return false ;  
	}  
	//获取屏幕尺寸，初始化一个空的渲染纹理对象  
	auto renderTexture = RenderTexture::create(getWinSize().width,getWinSize().height,Texture2D::PixelFormat::RGBA8888,GL_DEPTH24_STENCIL8); //最后一个参数省略的话，对clippingnode截图是无效的
	//清空并开始获取  
	renderTexture->beginWithClear(0.0f,0.0f,0.0f);  
	//遍历场景节点对象，填充纹理到RenderTexture中  
	getRunningScene()->visit();  
	//结束获取  
	renderTexture->end();  
	//保存文件  
	renderTexture->saveToFile(fileName,format);  
	//使用schedule在下一帧中调用callback函数  
	auto fullPath = FileUtils::getInstance()->getWritablePath() + fileName;  
	auto scheduleCallback = [&,fullPath,callback](float dt){  
		callback(fullPath); 
	};  
	return true;
}

Director::getInstance()->saveScreenshot("sss.png"， nullptr);

#include "base/ccUtils.h"
utils::captureScreen([](){log("ok");},"dd.png");