为信号加值

Question

这是任务：我捕获到来自的信号

QNetworkAccessManager* manager= new QNetworkAccessManager(this);
connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(parse_data_request(QNetworkReply*)));
connect(manager, &QNetworkAccessManager::finished, manager,
&QNetworkAccessManager::deleteLater,Qt::QueuedConnection);

而且我想使用QNetworkReply *发送到插槽parse_data_request int变量，如下所示：

QNetworkAccessManager* manager= new QNetworkAccessManager(this);
connect(manager, SIGNAL(finished(QNetworkReply*,int)), this, SLOT(parse_data_request(QNetworkReply*,int)));
connect(manager, &QNetworkAccessManager::finished, manager,
&QNetworkAccessManager::deleteLater,Qt::QueuedConnection);

我该怎么办？

Answer 1

如果您使用的是Qt5（看起来像是Qt5，则可以将lambda用作连接的目标...

int request_id = ...;
QNetworkAccessManager* manager= new QNetworkAccessManager(this);
connect(manager, &QNetworkAccessManager::finished, this,
        [this, request_id](QNetworkReply *reply)
        {
            parse_data_request(reply, request_id);
        });
connect(manager, &QNetworkAccessManager::finished, manager, &QNetworkAccessManager::deleteLater,Qt::QueuedConnection);