这次准备做一些网络的功能，账号注册登录的功能已经完成了，现在需要完成玩家头像的功能，首先是获取网络图片。

为此在网上看了很多博客和文章，终于尝试成功了，原帖在http://www.cnblogs.com/leehongee/p/4038311.html

但是现在只完成了在win32上获取图片，还没有尝试android平台，下次尝试获取联网权限。

在.h里包含头文件

#include "network/HttpClient.h"
using namespace cocos2d::network;

void doHttpRequest(const char* url,const char* tag,const ccHttpRequestCallback& callback);
void onHttpRequestImageCompleted(HttpClient *sender,HttpResponse *response);
//获取请求网络图片资源
cocos2d::Texture2D* texture;

void HelloWorld::doHttpRequest(const char* url,const ccHttpRequestCallback& callback)
{
  
    HttpRequest* request = new HttpRequest();
    request->setUrl(url);
    request->setRequestType(HttpRequest::Type::POST);
    
    //这是回调对象和回调函数
    request->setResponseCallback(callback);
    request->setTag(tag);
    
    
    HttpClient::getInstance()->send(request);
    
    //释放内存
    request->release();

}

void HelloWorld::onHttpRequestImageCompleted(HttpClient *sender,HttpResponse *response)
{
   
    if (!response)
    {
        return;
    }
    
    // You can get original request type from: response->request->reqType
    const char* tag  =  response->getHttpRequest()->getTag();
    
    if (0 != strlen(tag))
    {
        log("%s completed",response->getHttpRequest()->getTag());
    }
    
    if (!response->isSucceed())
    {
        log("error buffer: %s",response->getErrorBuffer());
        return;
    }
    
    
    std::vector<char> *buffer = response->getResponseData();
    
    //create image
    Image* image = new Image;
    image->initWithImageData((unsigned char*)buffer->data(),buffer->size());
    
    //create texture
    texture = new Texture2D();
    bool isImage = texture->initWithImage(image);

	if(isImage){
        log("Texture2D init success");
    }
    image->release();
}

doHttpRequest("http://127.0.0.1/pic/default.jpg","pic",CC_CALLBACK_2(HelloWorld::onHttpRequestImageCompleted,this));

调用这个函数之后，图片就存在texture里了