QT简单播放器实现

本文适合初学者借鉴和参考，且作者能力所限制，疏漏错误之处望各位指出，谢谢。

 

功能简陋，仅仅实现文件打开视频进行播放，看效果：

 

直接上代码：

man.cpp

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

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

    return a.exec();
}

manwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
class QMediaPlayer;
class QVideoWidget;
class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
private slots:
    void openFile();
private:
    QMediaPlayer *mediaPlayer;
    QVideoWidget *videoWidget;
    void createMenus();
    void createAction();
    QMenu *fileMenu;
    QAction *openAction;
};

#endif // MAINWINDOW_H

manwindow.cpp

#include "mainwindow.h"
#include<QMediaPlayer>
#include<QVideoWidget>
#include<QtWidgets>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    mediaPlayer=new QMediaPlayer;
    videoWidget=new QVideoWidget;
    //this->setFixedHeight(768);
    //this->setFixedWidth(1366);
    this->resize( QSize( 800, 600 ));
    setCentralWidget(videoWidget);
    mediaPlayer->setVideoOutput(videoWidget);
    createAction();
    createMenus();
}

MainWindow::~MainWindow()
{

}

void MainWindow::openFile()
{
    QString fileName=QFileDialog::getOpenFileName(this);
    mediaPlayer->setMedia(QUrl::fromLocalFile(fileName));
    mediaPlayer->setVolume(50);
    mediaPlayer->play();
}

void MainWindow::createMenus()
{
    fileMenu=menuBar()->addMenu("文件");
    fileMenu->addAction(openAction);
}

void MainWindow::createAction()
{
    openAction=new QAction("打开action",this);
    connect(openAction,SIGNAL(triggered()),this,SLOT(openFile()));
}