cocos2d-x C++ 获取网络图片缓存并展示

#ifndef __HttpGetImg__

#define __HttpGetImg__

#include "cocos2d.h"

#include "HttpRequest.h"

#include "HttpClient.h"

USING_NS_CC_EXT;

using namespace std;

USING_NS_CC;

class HttpGetImg : public cocos2d::CCLayer

{

public:

HttpGetImg();

~HttpGetImg();

//获取网络图片，需要地址

static void GetHttpImg(CCObject* obj, string imgurl,int number);

void onHttpRequestRptImg(cocos2d::extension::CCHttpClient *sender, cocos2d::extension::CCHttpResponse *response);

//按原来默认头像比例设置新图片大小

static void setImgSize(int oldhead_w,int oldhead_h,CCSprite* sprite);

//创建图片覆盖原有图片

static void CreateImg(CCSprite* tagSprite,CCSprite* oldSprite,CCTexture2D* texture,int newTag);

private:

};

#endif /* HttpGetImg */

#include "HttpGetImg.h"

#include "../DataModel/GlobalInfo.h"

#include "../GameConfig.h"

#include "../Commen/PublicDoFunc.h"

HttpGetImg::HttpGetImg(void)

{

}

void HttpGetImg::GetHttpImg(CCObject* obj, string imgurl,int number)

{

CCHttpRequest* request = new CCHttpRequest();

// required fields

request->setUrl(imgurl.c_str());

request->setRequestType(CCHttpRequest::kHttpGet);

request->setResponseCallback(obj, httpresponse_selector(HttpGetImg::onHttpRequestRptImg));

// optional fields

char thisnumber[10] = "";

sprintf(thisnumber, "%d",number);

request->setTag(thisnumber);

CCHttpClient::getInstance()->send(request);

request->release();

}

void HttpGetImg::onHttpRequestRptImg(CCHttpClient *sender, CCHttpResponse *response)

{

char c_tag[20]= "";

sprintf(c_tag, "%s",response->getHttpRequest()->getTag());

//    CCLog("%s completed", response->getHttpRequest()->getTag());

string str_tag = c_tag;

if (!response)

{

return;

}

// You can get original request type from: response->request->reqType

if (0 != strlen(response->getHttpRequest()->getTag()))

{

//        CCLog("%s completed", response->getHttpRequest()->getTag());

}

if (!response->isSucceed())

{

CCLog("response failed");

CCLog("error buffer: %s", response->getErrorBuffer());

return;

}

vector<char> *buffer = response->getResponseData();

//create image

CCImage* img = new CCImage;

img->initWithImageData((unsigned char*)buffer->data(),buffer->size());

//create texture

CCTexture2D* texture = new CCTexture2D();

bool isImg = texture->initWithImage(img);

img->release();

　　 //将texture存下来

texture

//已下是自己封装的PublicDoFunc异步调用主线程执行换图操作的部分，可以自己去封装

//SEL_CallFuncN pfnCallback =callfuncN_selector(View_Room::upPlayerHead);

//CCNode* nd = CCNode::create();

//buffer->clear();

//nd->setTag(CCString::create(str_tag)->intValue());

//PublicDoFunc::toDoFuncN(LAYER_ROOM, pfnCallback,nd);

}

void HttpGetImg::setImgSize(int oldhead_w,int oldhead_h,CCSprite* sprite)

{

float s_X=oldhead_w/sprite->getContentSize().width;

float s_Y=oldhead_h/sprite->getContentSize().height;

sprite->setScaleX(s_X);

sprite->setScaleY(s_Y);

}

void HttpGetImg::CreateImg(CCSprite* tagSprite,CCSprite* oldSprite,CCTexture2D* texture,int newTag)

{

int oldw =oldSprite->getContentSize().width;

int oldh =oldSprite->getContentSize().height;

if(texture!=NULL)

{

CCSprite* sprite = CCSprite::createWithTexture(texture);

//按原比例设置

setImgSize(oldw,oldh,sprite);

sprite->setPosition(oldSprite->getPosition());

tagSprite->addChild(sprite,1,newTag);

texture->release();

}

}

HttpGetImg::~HttpGetImg(void)

{

}

原文地址：https://www.cnblogs.com/luorende/p/6255766.html