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经过调试，我确定调用this->getNetReply()时没有调用replyFinish()槽。这些是我的文件，在 main() 函数中，我以这种方式调用 getNetReply：a.getNetReply(); 我确实将 QT+=network 添加到我的 qmake 中。请帮我。非常感谢。

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
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1 回答 1

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

于 2014-09-16T21:12:51.727 回答