Qt实现打开网页

Qt实现打开网页，新建一个mainwindow。在UI界面添加一个Text Browser。

首先在myHTTP.pro中添加QT   +=  network

在mainwindow.h中新建两个类，QNetworkReply和QNetworkAccessManager。

class QNetworkReply;

class QNetworkAccessManager;

private: QNetworkAccessManager *manager;

private slots:  replyFinished(QNetworkReply *);

再新建一个私有指针和一个槽，用来接收信号。做出相应的操作。

私有指针作为发送点，槽作为接受点。

mainwindow.h

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>class QNetworkReply;class QNetworkAccessManager;namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();private:    Ui::MainWindow *ui;    QNetworkAccessManager *manager;private slots:    void replyFinished(QNetworkReply *);};

mainwindow.cpp

#include "mainwindow.h"#include "ui_mainwindow.h"#include <QtNetwork/QtNetwork>#include <QTextCodec>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    manager=new QNetworkAccessManager(this);    connect(manager,SIGNAL(finished(QNetworkReply*)),this,            SLOT(replyFinished(QNetworkReply*)));    manager->get(QNetworkRequest(QUrl("http://www.baidu.com")));}MainWindow::~MainWindow(){    delete ui;}void MainWindow::replyFinished(QNetworkReply *reply){    QTextCodec *codec=QTextCodec::codecForName("UTF-8");    QString all=codec->toUnicode(reply->readAll());    ui->textBrowser->setText(all);    reply->deleteLater();}

connect(sender,SIGNAL(signal),this,SLOT(slot));