Question

调试完成后，我确定在调用this-＆gt; getNetReply（）时没有调用replyFinish（）槽。这些是我的文件，在main（）fumction中我用这种方式调用getNetReply：Networking a; a.getNetReply（）; 我确实在我的qmake中添加了QT + = network。请帮我。非常感谢你。

我的networking.cpp文件

#include "networking.h"
#include <QUrl>
#include <QNetworkRequest>

// constructor    

void Networking::getNetReply(){
    QNetworkAccessManager *man  = new QNetworkAccessManager(this);
    QObject::connect(man, SIGNAL(finished(QNetworkReply *)), this, SLOT(replyFinished(QNetworkReply *)));
    qDebug() << "connected";
    QNetworkRequest req;
    req.setUrl(QUrl("http://www.google.com"));
    man->get(req);

}
// this method not called
void Networking::replyFinished(QNetworkReply *reply){
    QByteArray data = reply->readAll();
    QString str = QString(data);
    this->netRep = str;
    code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
}

我的networking.h头文件：

#ifndef NETWORKING_H
#define NETWORKING_H

#include <QObject>
#include <QNetworkAccessManager>
#include <QNetworkReply>

class Networking : public QObject
{
    Q_OBJECT
public:
    QString netRep;
    int code;
    explicit Networking(QObject *parent = 0);
    void getNetReply();

public slots:
    void replyFinished(QNetworkReply*);

};

#endif // NETWORKING_H

Answer 1

get（）函数返回一个QNetworkReply对象。连接到该对象的错误信号，它将告诉您是否发生错误（以及哪个）。

发送信号时不调用Qt C ++ Slot

1 个答案: