QT-Qt显示GIF图片

相关资料：

https://blog.csdn.net/kidults/article/details/80195524

main.cpp

#include "mainwindow.h"

#include <QApplication>

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

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QPainter>

#include "gifWidget.h"

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
    void paintEvent(QPaintEvent* pEvent);

private:
    Ui::MainWindow *ui;

    gifWidget * m_pgifWidget;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

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

    setWindowTitle(QStringLiteral("Qt显示GIF图片"));

    m_pgifWidget = new gifWidget(this);
    m_pgifWidget->setGeometry(100,200, 400,300);
}

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

void MainWindow::paintEvent(QPaintEvent *pEvent)
{
    // 界面背景图片片
    QPainter painter(this);
    painter.drawPixmap(0, 0, this->width(), this->height(), QPixmap(":/new/prefix1/q.jpg"));
}

gifWidget.h

#ifndef GIFWIDGET_H
#define GIFWIDGET_H

#include <QWidget>
#include <QLabel>
#include <QPushButton>
#include <QVBoxLayout>
#include <QMovie>

class gifWidget : public QWidget
{
    Q_OBJECT

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

private:
    QMovie *movie;
    QLabel *label;
    bool isPlaying;
    QPushButton *button;
    QPushButton *button2;
private slots:
    void playGif();
};

#endif // GIFWIDGET_H

gifWidget.cpp

#include "gifWidget.h"

gifWidget::gifWidget(QWidget *parent) :
    QWidget(parent)
{
    isPlaying = false;

    movie = new QMovie(":/new/prefix1/A.gif");
    label = new QLabel(this);
    button = new QPushButton(this);

    button->setText(QStringLiteral("播放"));
    connect(button,SIGNAL(clicked(bool)),this,SLOT(playGif()));

    button2 = new QPushButton(this);
    button2->setGeometry(button->x(), button->y()+100, button2->width(), button2->height());

    QVBoxLayout *hLayout = new QVBoxLayout(this);
    hLayout->addWidget(button);
    hLayout->addWidget(label);
    setLayout(hLayout);
}

gifWidget::~gifWidget()
{

}

void gifWidget::playGif()
{
    if(isPlaying){
        movie->stop();
        label->clear();    //stop的时候把label清空
        isPlaying = false;
        button->setText(QStringLiteral("播放"));
    }else{
        label->setMovie(movie); //为label设置movie
        movie->start();         //开始显示
        isPlaying = true;
        button->setText(QStringLiteral("停止"));
    }
}