25.QT进度条

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
 5 #include <QProgressBar>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

private slots:
    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;
    QProgressBar *process;
};

#endif // MAINWINDOW_H

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <windows.h>

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

11     process = new QProgressBar(this);
12     process->resize(300,100);
13     process->move(50,50);
}

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

void MainWindow::on_pushButton_clicked()
{
    process->setRange(0,100);
24     for(int i=0;i<=100;i++)
25     {
26         process->setValue(i);
27         Sleep(30);
28     }
}