1.头文件
 

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QDebug>
#include <QMovie>QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();private slots:void login();private:Ui::Widget *ui;
};
#endif // WIDGET_H

2.源文件
 

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{this->setWindowFlag(Qt::FramelessWindowHint);ui->setupUi(this);ui->logolab->setPixmap(QPixmap(":/pictrue/5.png"));ui->logolab->setScaledContents(true);ui->passwdlab->setPixmap(QPixmap(":/pictrue/2.jpg"));ui->passwdlab->setScaledContents(true);ui->userlab->setPixmap(QPixmap(":/pictrue/6.jpg"));ui->userlab->setScaledContents(true);QMovie *mv = new QMovie(":/pictrue/4.gif");ui->lab1->setMovie(mv);mv->start();ui->lab1->setScaledContents(true);QMovie *mv1 = new QMovie(":/pictrue/6.gif");ui->lab2->setMovie(mv1);mv1->start();ui->lab2->setScaledContents(true);ui->passwdedit->setEchoMode(QLineEdit::Password);//qt4 实现取消按钮关闭窗口connect(ui->cancelbtn,SIGNAL(clicked()),this,SLOT(close()));//qt5connect(ui->dengbtn,&QPushButton::clicked,this,&Widget::login);}Widget::~Widget()
{delete ui;
}void Widget::login()
{if(ui->useredit->text() == "admin" && ui->passwdedit->text() == "123456"){qDebug() << "登陆成功" ;this->close();}else{ui->passwdedit->clear();qDebug() <<"登陆失败";}
}