QObject连接功能 [英] QObject connection function

问题描述

我检查了其他类似的问题并尝试了其解决方案，但它们对我不起作用。

I checked other similar questions and tried their solutions but they don't work for me.

我基本上是在尝试制作仅发布帖子的http客户端要求。为此，我需要将 QNetworkManager 的完成信号连接到某个回调插槽。

I'm basically trying to make a http client that only makes post requests. In order to do this, I need to connect QNetworkManager's finished signal to some callback slot.

这是我的代码。

h文件：

...
public slots:
   void finishedSlot(QNetworkReply* reply);
private:
    QNetworkAccessManager *network_manager;
...

cpp文件：

...
Class1::Class1(){
    network_manager = new QNetworkAccessManager(this);
    QObject::connect(network_manager, SIGNAL(finished(QNetworkReply *)), this, SLOT(finishedSlot(QNetworkReply *)));
}
...
void Class1::finishedSlot(QNetworkReply* reply)
{
    // some logic with reply
}
...

如您所见，该插槽肯定存在，并且在头文件。所以我不知道为什么会这样。我已经尝试清理，运行qmake并重建。

As you can see, the slot is definitely present and it is declared under public slots in header file. So I have no idea why this is happening. I already tried clean, run qmake, and rebuild.

错误消息是：

QObject :: connect：没有这样的插槽QObject :: finishedSlot（QNetworkReply
*）

"QObject::connect: No such slot QObject::finishedSlot(QNetworkReply *)"

任何想法？

推荐答案

您可能忘记了使用 Q_OBJECT 宏。每个实现自己的插槽/信号的类都需要该宏。不要忘记您需要将标头/源文件添加到.pro文件中。

You probably forgot to use the Q_OBJECT macro. Every class that implements its own slots/signals needs that macro. Don't forget that you need to add your header/source file to the .pro file.

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