QT5-控件-QProgressBar-进度条-用来做下载进度，文件读取进度还不错

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QProgressBar>

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

    QProgressBar* progress[] ;
};

#endif // MAINWINDOW_H

#include "mainwindow.h"

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

    progress[] = new QProgressBar(this);
    progress[]->setRange(,);
    progress[]->setValue();
    progress[]->setOrientation(Qt::Horizontal);
    progress[]->setGeometry(,,,);
    progress[]->setInvertedAppearance(true); // 设置为true则与默认方向相反
}

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();
}