QHttp下载二进制文件的问题

[weixin_38096180]

我的代码如下：void WebView::downloadRequestedSlot(const QNetworkRequest &req){    downFileHttp = new QHttp(this);    connect(downFileHttp, SIGNAL(requestFinished(int, bool)), \            this, SLOT(requestFinishedSlot(int, bool)));    downFileHttp->setHost(req.url().host(), req.url().port());    index = downFileHttp->get(req.url().path(), downFile);    downFileHttp->close();}void WebView::requestFinishedSlot(int requestId, bool error){    if(index == requestId) {        downFile->close();        downFileHttp->close();    }}下载文本文件没有问题，但却下载二进制文件如图片却不能下载下来，搞不清楚怎么回事，查了大批的代码，都实践了，都下载不下来，无语。。。。等待大家的回复。