QT5-控件-QProgressBar-進度條-用來做下載進度，文件讀取進度還不錯

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QProgressBar>

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

    QProgressBar* progress[10] ;
};

#endif // MAINWINDOW_H

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    this->resize(400,300);
    progress[0] = new QProgressBar(this);
    progress[0]->setMinimum(0);\
    progress[0]->setMaximum(100);
    progress[0]->setValue(50);
    progress[0]->setOrientation(Qt::Horizontal);
    progress[0]->setGeometry(10,30,300,30);

    progress[1] = new QProgressBar(this);
    progress[1]->setRange(0,100);
    progress[1]->setValue(70);
    progress[1]->setOrientation(Qt::Horizontal);
    progress[1]->setGeometry(10,70,300,30);
    progress[1]->setInvertedAppearance(true); // 設置為true則與默認方向相反
}

MainWindow::~MainWindow()
{

}

#include "mainwindow.h"
#include <QApplication>

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

    return a.exec();
}

#include "mainwindow.h"
#include <QApplication>

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

    return a.exec();
}