C++ 在HtmlManager类中，然后在replyFinished方法中调用emit-stringReceived（str）。谢谢您的帮助。（我不熟悉使用Qt，很抱歉您必须回答一个可能非常简单的问题） #include <QtGui/QApplicati

---

在HtmlManager类中，然后在

replyFinished

方法中调用

emit-stringReceived（str）

。谢谢您的帮助。（我不熟悉使用Qt，很抱歉您必须回答一个可能非常简单的问题）

#include <QtGui/QApplication>
#include "mainwindow.h"
#include "htmlmanager.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include "htmlmanager.h"
#include <QString>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    HtmlManager html;

private slots:
    void on_addButton_clicked();
    void on_actionExit_triggered();
    void on_removeButton_clicked();
    void on_downloadButton_clicked();
private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_addButton_clicked()
{
    if(!ui->lineEdit->text().isEmpty())
    {
        ui->listWidget->addItem(ui->lineEdit->text());
    }
    else
    {
        qDebug() << "Input field is empty.";
    }
}

void MainWindow::on_actionExit_triggered()
{
    //doesn't do anything right now
}

void MainWindow::on_removeButton_clicked()
{
    if(ui->listWidget->currentItem()) //If an item is selected
    {
        delete ui->listWidget->currentItem();
    }
    else
    {
        qDebug() << "No selection";
    }
}

void MainWindow::on_downloadButton_clicked()
{
    if(ui->listWidget->currentItem()) //If an item is selected
    {
        html.fetch(ui->listWidget->currentItem()->text());
        ui->textBrowser->setText(html.str);
    }
    else
    {
        qDebug() << "No selection";
    }

}

#ifndef HTMLMANAGER_H
#define HTMLMANAGER_H

#include <QObject>
#include <QDebug>
#include <QtNetwork>
#include <QNetworkReply>
#include <QNetworkAccessManager>
#include <QString>


class HtmlManager : public QObject
{
    Q_OBJECT
    public:
        HtmlManager();
        void fetch(QString Url);
        QString str;

    public slots:
        void replyFinished(QNetworkReply* pReply);

    private:
        QNetworkAccessManager* m_manager;
};

#endif // HTMLMANAGER_H

#include "htmlmanager.h"

HtmlManager::HtmlManager()
{
    m_manager = new QNetworkAccessManager(this);
    connect(m_manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)));
}
void HtmlManager::fetch(QString Url)
{
    m_manager->get(QNetworkRequest(QUrl(Url)));
    qDebug() << "Sending network request.";
}
void HtmlManager::replyFinished(QNetworkReply* pReply)
{
    qDebug() << "Recieved network reply.";
    QByteArray data=pReply->readAll();
    str = data;
}

connect(html, SIGNAL(stringReceived(QString)), ui->textBrowser, SLOT(setText(QString));