如何解决（发送者/接收者参数不兼容）的问题？

发布于 2024-12-01 17:43:51 字数 953 浏览 0 评论 0原文

这是我使用 CONNECT 的代码。我用它来转到插槽 slotReadyRead ，我可以在其中读取回复内容。但是我在调试或运行程序时收到一条消息

QObject::connect：发送者/接收者参数不兼容 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);
}

public slots:
    void slotReadyRead(QNetworkReply* reply);

原文

Here is the code where I use CONNECT.I use it to go to the slot slotReadyRead where i can read the content the reply.
But I have a message while debugging or running the program which is

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);
}

public slots:
    void slotReadyRead(QNetworkReply* reply);

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独守阴晴ぅ圆缺 2024-12-08 17:43:51

该插槽需要具有与信号兼容的签名。因此，要么将其定义为：

void slotReadyRead();

要么将回复设为可选：

void slotReadyRead(QNetworkReply* reply = null);

The slot needs to have a signature compatible with the signal. So either define it as:

void slotReadyRead();

Or make the reply optional:

void slotReadyRead(QNetworkReply* reply = null);

回复收藏 0 原文

￡冰雨忧蓝° 2024-12-08 17:43:51

如果无意的话，您不能强行将插头插入插座。我看到两个选项：

使 reply 成为 MainWindow 的成员（快速而肮脏的解决方案）
创建一个新类，该类将具有 QNetworkReply* 作为一个成员和一个槽，用于在准备就绪时处理回复的数据。

顺便说一句：我想你想要 connect(reply, SIGNAL(finished()), this, SLOT(slotProcessReply()) (文档)。这里是 Qt 示例集合中的 HTTP 示例！ a href="http://doc.qt.nokia.com/4.7/network-http-httpwindow-h.html" rel="nofollow">network/http/httpwindow.h 和 network/http/httpwindow.cpp