coco2dx加载网络图片并保存

直接上代码

bool HelloWorld::init()
{
    //////////////////////////////
    // 1. super init first
    if ( !Layer::init() )
    {
        return false;
    }

    HttpRequest* request = new HttpRequest();
    request->setUrl("http://neoimaging.beareyes.com.cn/png2/ni_png_2_1518.png");
    request->setRequestType(HttpRequest::Type::GET);
    request->setResponseCallback(this, httpresponse_selector(HelloWorld::onHttpRequestCompleted));
    request->setTag("GET test1");
    HttpClient::getInstance()->send(request);
    request->release();

    return true;
}

void HelloWorld::onHttpRequestCompleted(HttpClient *sender, HttpResponse *response)
{
    if (!response)
    {
        return;
    }
    
    // You can get original request type from: response->request->reqType
    if (0 != strlen(response->getHttpRequest()->getTag())) 
    {
        log("%s completed", response->getHttpRequest()->getTag());
    }
    int statusCode = response->getResponseCode();
    if (!response->isSucceed()) 
    {
        log("response failed");
        log("error buffer: %s", response->getErrorBuffer());
        return;
    }

    //get data
    std::vector<char> *buffer = response->getResponseData();

    //create image
    CCImage* img = new CCImage;
    img->initWithImageData((unsigned char*)buffer->data(),buffer->size());
    
    //create texture
    cocos2d::CCTexture2D* texture = new CCTexture2D();
    bool isImg = texture->initWithImage(img);
    img->release();

    //create sprite
    CCSprite* sprite = CCSprite::createWithTexture(texture);
    texture->release();
    sprite->setPosition(ccp(100,100));
    addChild(sprite,100);

    //write file
    std::string path = CCFileUtils::sharedFileUtils()->getWritablePath();
    path+="download_image.png";

    FILE *fp = fopen(path.c_str(), "wb+");
    fwrite(buffer->data(), 1,buffer->size(), fp);
    fclose(fp);
}