cocos2dx获取网络时间（二）：浅析CCHttpClient(4)

p>           _pTarget = pTarget;

p>           _pSelector = pSelector;

p>        

p>            if (_pTarget)

p>            {

p>                _pTarget->retain();

p>            }

p>       }　

p> 

p>　　然后通过CCHttpClicent的send(CCHttpRequest* request)方法传入CCHttpRequest的实例，在异步请求Http完成后，调用注册的回调方法返回给我们Http请求的状态和数据。

p> 

p>　　初步了解了cocos2dx中回调的实现后，回到我们的NetTime中，在NetTime.h头文件中声明函数指针和用于注册的宏定义：　

p> 

p>　　

p> 

p>typedef void (CCObject::*SEL_NetTime)(WebTime * pSender);

p>#define netTime_selector(_SELECTOR) (SEL_NetTime)(&_SELECTOR)

p>　　同时声明用于存放调用者实例和函数指针的字段：　　

p> 

p>SEL_NetTime _pSelector;

p>CCObject * _pTarget;

p>　　通过重载requestNetTime方法传入回调方法的调用者和函数指针：　

p> 

p>void NetTime::requestNetTime(CCObject * pTarget, SEL_NetTime pSelector)

p>{

p>    requestNetTime();

p>    _pTarget = pTarget;

p>    _pSelector = pSelector;

p>}

p>　　在onHttpComplete方法的最后调用回调方法，并把NetTime的实例作为回调方法的参数：

p> 

p>　　

p> 1 void NetTime::onHttpComplete(CCHttpClient * sender, CCHttpResponse * response)

p> 2 {

p> 3     CCHttpClient::getInstance()->release();

p> 4     if (!response)

p> 5         return;

p> 6     if (0 != strlen(response->getHttpRequest()->getTag()))

p> 7     {

p> 8         CCLog("%s completed", response->getHttpRequest()->getTag());

p> 9     }

p>10     int statusCode = response->getResponseCode();

p>11     char statusString[64] = {};

p>12     sprintf(statusString, "HTTP Status: %d, tag = %s", statusCode, response->getHttpRequest()->getTag());

p>13     CCLog("%s", statusString);

p>14     if (!response->isSucceed())

p>15     {

p>16         CCLog("response failed");

p>17         CCLog("error buffer:%s", response->getErrorBuffer());

p>18         return;

p>19     }

p>20     std::vector<char> * buffer = response->getResponseData();

p>21     std::string str;

p>22     for (unsigned i = 0; i < buffer->size(); i++)

p>23     {

p>24         char a = (*buffer)[i];

p>25         str.append(1, a);

p>26     }

p>27     CCLog("%s", str.c_str());