1.我們需要的頭文件

2. .cpp文件

#include "videowin.h"
#include "ui_videowin.h"
#include <QFileDialog>
#include <QTime>
#include <QMessageBox>
#include <QFont>
videowin::videowin(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::videowin)
{
    m_pWidget = new QWidget(this);
    m_pWidget->setGeometry(0, 0, 1152, 616);
    QPalette pal(m_pWidget->palette());

    //設置背景黑色
    pal.setColor(QPalette::Background, Qt::black);
    m_pWidget->setAutoFillBackground(true);
    m_pWidget->setPalette(pal);
    m_pWidget->show();

    ui->setupUi(this);

    this->setWindowIcon(QIcon(":/icon_video/video.png"));
    this->setWindowTitle("大魚播放器");
    this->i = 0;
    this->n = 0;
    this->j = 0;
    ui->verticalSlider->hide();
    ui->listWidget->hide();
    //this->player->setVolume(position);
    this->videoWidget = new QVideoWidget(this);
    this->videoWidget->setGeometry(50,40,720,470);//播放視頻大小位置
    this->player = new QMediaPlayer(this);
    this->ui->label->setText("00:00/00:00");//顯示時間的
    this->ui->label->setStyleSheet("color:white");
    this->ui->label_2->setStyleSheet("color:white");
    this->ui->label_2->setFont(QFont("阿里媽媽數黑體",16));
    this->timer = new QTimer(this);//定時器
    this->ui->pushButton->setIcon(this->style()->standardPixmap(QStyle::SP_MediaPlay));//給按鍵設置類型
    //this->time = new QTime(this);
    connect(this->ui->listWidget,SIGNAL(itemDoubleClicked(QListWidgetItem *)),this,SLOT(changeMovie(QListWidgetItem *)));
    connect(this->timer,SIGNAL(timeout()),this,SLOT(updateTime_1()));
    connect(this->player,SIGNAL(durationChanged(qint64)),this,SLOT(getDuration_1(qint64)));
    connect(this->player,SIGNAL(positionChanged(qint64)),this,SLOT(setSliderValue(qint64)));
}
videowin::~videowin()
{
    delete ui;
}


//獲取文件信息
void videowin::on_pushButton_7_clicked()
{
    //this->namelist.clear();
    //this->ui->listWidget->clear();
    this->namelist =QFileDialog::getOpenFileNames(this,"選擇",".","WMV(*.wmv);;AVI(*.avi);;MP4(*.MP4)");
    for(int i = 0;i<namelist.size();i++)
    {
        QFileInfo fileInfos(namelist.at(i));//獲取文件信息
        QListWidgetItem *item = new QListWidgetItem(fileInfos.fileName(),this->ui->listWidget);
        item->setToolTip(namelist.at(i));
        this->ui->listWidget->addItem(item);
    }
}

//雙擊能實現播放視頻
void videowin::changeMovie(QListWidgetItem *item)
{
    this->index = this->ui->listWidget->currentRow();
    //設置播放器要播放的視頻
    this->player->setMedia(QUrl(item->toolTip()));
    //獲取視頻名字
    this->name = item->text()+"   ";
    this->ui->label_2->setText(this->name);
    QFont ft;
    ft.setPointSize(14);
    this->ui->label_2->setFont(ft);
    //播放
    this->player->setVideoOutput(this->videoWidget);
    this->player->play();
    this->ui->pushButton->setIcon(this->style()->standardPixmap(QStyle::SP_MediaPause));
    this->timer->start(1000);
}


//暫停鍵
void videowin::on_pushButton_clicked()
{
    int state = this->player->state();//獲取播放器的狀態(tài)
    if(state == QMediaPlayer::PausedState)//暫停
    {
        this->player->play();
        this->ui->pushButton->setIcon(this->style()->standardPixmap(QStyle::SP_MediaPause));

    }
    else if(state == QMediaPlayer::PlayingState)//播放中
    {
        this->player->pause();
        this->ui->pushButton->setIcon(this->style()->standardPixmap(QStyle::SP_MediaPlay));
    }
}
//顯示視頻進度和時長
void videowin::updateTime_1()
{
    this->n++;//時間一到，顯示名稱的一半
    if(this->n == this->name.size())
    {
        this->n = 0;
    }
    this->ui->label_2->setText(this->name.mid(this->n));//顯示名稱
    qint64 dur = this->player->duration();//獲取到總時長
    qint64 pos = this->player->position();//獲取當前的播放位置
    QTime time1(0,0,0,0),time2(0,0,0,0);//顯示：轉成 00：00
    this->ui->label->setText(time1.addMSecs(pos).toString("mm:ss") +"/" +time2.addMSecs(dur).toString("mm:ss"));
}

void videowin::getDuration_1(qint64 duration)
{
    qDebug()<<duration;
    this->ui->horizontalSlider->setRange(0,duration);//設置進度條范圍
    this->ui->horizontalSlider->setValue(0);

}
//視頻滑塊
void videowin::on_horizontalSlider_sliderMoved(int position)
{
    this->player->setPosition(position);//根據滑塊的位置設置播放音樂的位置
}

//下集
void videowin::on_pushButton_2_clicked()
{
    if(this->namelist.empty())
    {
        QMessageBox::information(this,"提示","沒有可播放的視頻");
    }
    else
    {
        this->index++;
        if(this->index == this->namelist.size())
        {
            QMessageBox::information(this,"提示","已經是最后一個視頻了");
            this->index--;
        }
        this->player->stop();
        QFileInfo fileInfo(this->namelist.at(this->index));
        this->name = fileInfo.fileName()+"   ";
        this->ui->label->setText(this->name);
        this->player->setMedia(QUrl(this->namelist.at(this->index)));
        this->player->play();
    }
}
//控制音量條
void videowin::on_pushButton_4_clicked()
{

    if(i == 0)
    {
        ui->verticalSlider->show();
        i = 1;
    }
    else if( i == 1)
    {
        ui->verticalSlider->hide();
        i = 0;
    }

}
//調節(jié)音量
void videowin::on_verticalSlider_sliderMoved(int position)
{
    this->player->setVolume(position);
}
//更新視頻滑塊
void videowin::setSliderValue(qint64 position)
{
     this->ui->horizontalSlider->setValue(position);
}
//選集按鈕
void videowin::on_pushButton_5_clicked()
{
    if(j == 0)
    {
        ui->listWidget->show();
        j = 1;
    }
    else if( j == 1)
    {
        ui->listWidget->hide();
        j = 0;
    }
}

3.ui界面

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