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__) */

//
//  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;
}

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);
}

（编辑：李大同）

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