Qt，如何保持QNetworkReply.replyFinished顺序？

Question

我在撰写Qt网络代码时有疑问。 我使用QNetworkAccessManager来获取一系列网页，例如：

www.google.com/1.php
www.google.com/2.php
www.google.com/3.php
...

并且可能不存在大号页面，例如www.google.com/50.php。

我的代码如下：

class mythread: public QThread
{
protected:    
void run()
    {
        connect(manager,SIGNAL(finished(QNetworkReply*)),
        this,SLOT(replyFinished(QNetworkReply*)));
        for(int i=1 ; i<=20;i++)
        {
            QString tmpurl = [URL]+"/"+i ;
            request->setUrl(tmpurl);
            reply = manager->get(*request);
            reply->waitForReadyRead(2000);
        }
    }

void replyFinished(QNetworkReply *r)
    {
        /*...
        if the tmpUrl web page not found ,
        then
        print "NOT FOUND"
        else
        print "FOUND"
        ...
        */
    }
    private:
        QNetworkAccessManager *manager ;
        QNetworkRequest *request ;
        QNetworkReply *reply ;
    };

当我运行代码时，结果是：

NOT FOUND
NOT FOUND
FOUND
FOUND
NOT FOUND
NOT FOUND
....

如何按顺序保留QNetworkReply s readyread信号？ 我想要结果湖：

FOUND
FOUND
NOT FOUND
NOT FOUND
NOT FOUND
NOT FOUND
...