这是我使用 CONNECT 的代码。我用它转到插槽 slotReadyRead，在那里我可以阅读回复的内容。 但是我在调​​试或运行程序时收到一条消息

QObject::connect: Incompatible sender/receiver arguments QNetworkReplyImpl::readyRead() --> MainWindow::slotReadyRead(QNetworkReply*)

.cpp

    void MainWindow::on_pushButton_clicked()
{
     QNetworkAccessManager* manager = new QNetworkAccessManager(this);
     QNetworkRequest request;
     request.setUrl(QUrl("http://lascivio.co/mobile/get.php?name=marwa"));
     QNetworkReply *reply = manager->get(request);
     connect(reply, SIGNAL(readyRead()), this, SLOT(slotReadyRead(QNetworkReply*)));
}
void MainWindow::slotReadyRead(QNetworkReply* reply)
{
    QByteArray b (reply->readAll());
    QString s(b);
    ui->lineEdit->setText(s);
}

.h

public slots:
    void slotReadyRead(QNetworkReply* reply);

最佳答案

插槽需要具有与信号兼容的签名。所以要么将其定义为:

void slotReadyRead();

或者将回复设为可选:

void slotReadyRead(QNetworkReply* reply = null);

https://stackoverflow.com/questions/7207083/