错误:对'QNetworkAccessManager::QNetworkAccessManager(Networking* const的调用没有匹配函数

Question

这是我的档案。我对此有一些意见。

   // networking.h

#ifndef NETWORKING_H
#define NETWORKING_H

#include <QNetworkReply>

class Networking
{
public:
    Networking();
    void getNetReply();
    void replyFinished(QNetworkReply*);
};

#endif // NETWORKING_H




//networking.cpp
#include "networking.h"
#include <QtNetwork/QNetworkAccessManager>
#include <QUrl>
#include <QNetworkRequest>
#include <QObject>

Networking::Networking()
{
}

void Networking::getNetReply(){
    QNetworkAccessManager * man;
    man = new QNetworkAccessManager(this);
    qDebug() << "Getting content..." << endl;

    QNetworkRequest request(QUrl("http://www.google.pl"));
    qDebug() << "Network request..." << endl;

    QNetworkReply * NetRepl;
    QObject::connect(man, SIGNAL(finished(QNetworkReply *)), this, SLOT(replyFinished(QNetworkReply*)));

    NetRepl = man->get(request);
    qDebug() << "Network reply..." << endl;

    qDebug() << "Connecting..." << endl;

}

void Networking::replyFinished(QNetworkReply* reply){
    // my code
    reply->readAll();
}

我的错误信息。我在谷歌上搜索了很多，并阅读了这些文档：

错误:没有调用QNetworkAccessManager::QNetworkAccessManager(Networking* const) man = new QNetworkAccessManager(this)的匹配函数； 20:错误:没有调用QObject::connect(QNetworkAccessManager*&, const char*, Networking* const, const char*) QObject::connect(man, SIGNAL(finished(QNetworkReply *)), this, SLOT(replyFinished(QNetworkReply*)));的匹配函数

Answer 1

将Q_OBJECT宏添加到没有;的类中

class Networking : public QObject
{
Q_OBJECT
public:
    Networking();
    void getNetReply();

重建所有项目

没有这个宏，moc就找不到您的类，也不能使用信号/插槽机制。而且，您的类应该从QObject显式或隐式派生。