android - 如何使用 url 创建 Sprite？

Question

我正在使用 cocos2dx v3.0 开发跨平台应用程序(iOS、Android)。我想用 URL 创建一个 CCSprite。我认为没有 cocos 方法可以做到这一点，所以我必须为 Android 和 iOS fork 我的代码。

Answer 1

You have to Http request the image url and once you got the response, you can create image from that response data and save it to your phone. After that you can create the sprite from the save image.

    void ClassName::downLoadImage()
    {
            std::string strImage = "img.png";

            CCHttpRequest* request = new CCHttpRequest();
            request->setUrl("url of your image");
            request->setRequestType(CCHttpRequest::kHttpGet);
            request->setResponseCallback(this, httpresponse_selector(ClassName::onImageDownLoaded));
            request->setTag(strImage.c_str());
            CCHttpClient::getInstance()->send(request);
            request->release();
    }

    void ClassName::onImageDownLoaded(CCHttpClient* pSender, CCHttpResponse* pResponse)
    {
        CCHttpResponse* response = pResponse;

        if (!response)
        {
            CCLog("No Response");
            return;
        }
        int statusCode = response->getResponseCode();

        char statusString[64] = {};
        sprintf(statusString, "HTTP Status Code: %d, tag = %s", statusCode, response->getHttpRequest()->getTag());
        CCLog("response code: %d", statusCode);

        if (!response->isSucceed())
        {
            CCLog("response failed");
            CCLog("error buffer: %s", response->getErrorBuffer());
            return;
        }
        std::vector<char> *buffer = response->getResponseData();

        CCImage * img=new CCImage();
        img->initWithImageData(&(buffer->front()), buffer->size());

        // Save image file to device.
        std::string writablePath = CCFileUtils::sharedFileUtils()->getWritablePath();
        writablePath.append(response->getHttpRequest()->getTag());


         //Now create Sprite from downloaded image
         CCSprite* pSprite = CCSprite::create(writablePath.c_str());
         addchild(pSprite);
    }