代码：

#include "mywidget.h"
#include "ui_mywidget.h"

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

    ui->background->setPixmap(QPixmap(":/qt picture/logo.png"));
//    ui->background->setMovie(QMovie(":/qt picture/qq2.gif"));
    ui->background->setScaledContents(true);

}

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