cocos2dx 3.2截屏功能

<1>JNSaveScreenUtils.h

//
// JNSaveScreenUtils.h
// JNTest
//
// Created by jianan on 15/6/3.
//
//

#ifndef __JNTest__JNSaveScreenUtils__
#define __JNTest__JNSaveScreenUtils__

#include "cocos2d.h"
USING_NS_CC;
#include<string>
using namespace std;

#define winSize Director::getInstance()->getWinSize()

class JNSaveScreenUtils : public Ref
{
public:
JNSaveScreenUtils();
~JNSaveScreenUtils();
static JNSaveScreenUtils* getInstance();
void captureScreen(string fileName);
private:
CC_SYNTHESIZE(string, _saveFilePath, SaveFilePath);
};

#endif /* defined(__JNTest__JNSaveScreenUtils__) */<2>JNSaveScreenUtils.cpp
//
// JNSaveScreenUtils.cpp
// JNTest
//
// Created by jianan on 15/6/3.
//
//

#include "JNSaveScreenUtils.h"
using namespace utils;

static JNSaveScreenUtils* instance = NULL;

JNSaveScreenUtils::JNSaveScreenUtils(){

}

JNSaveScreenUtils::~JNSaveScreenUtils(){

}

JNSaveScreenUtils* JNSaveScreenUtils::getInstance(){
if(!instance){
instance = new JNSaveScreenUtils();
}
return instance;
}

void JNSaveScreenUtils::captureScreen(string fileName){

//void captureScreen(const std::function<void(bool, const std::string&)>& afterCaptured, const std::string& filename);
::captureScreen([](bool b, string name){

log("the pic is saved: %s,file name:%s",b?"success":"field",name.c_str());

}, fileName);

_saveFilePath = FileUtils::getInstance()->getWritablePath() + fileName;
}<3>
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !Layer::init() )
{
return false;
}
this->setTag(999);

Sprite* sp = Sprite::create("HelloWorld.png");
sp->setPosition(Vec2(winSize.width/2, winSize.height/2));
this->addChild(sp);

scheduleOnce(schedule_selector(HelloWorld::Main), 1.0f);

return true;
}

void HelloWorld::Main(float dt){

string filePath = JNSaveScreenUtils::getInstance()->getSaveFilePath(); //利用截屏图片来创造新的精灵
Sprite* sp = Sprite::create(filePath);
sp->setPosition(winSize.width/3, winSize.height/3);
addChild(sp);
}