qt完成对话框提示

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    //去掉头部
    this->setWindowFlag(Qt::FramelessWindowHint);
    //去掉空白
    this->setAttribute(Qt::WA_TranslucentBackground);

    //登录界面取消按钮  收到连接信号和自定义槽函数，基于qt4版本
    connect(ui->Btn2,SIGNAL(clicked()),this,SLOT(my_solt()));

    //登录界面实现
    connect(ui->Btn1,SIGNAL(clicked()),this,SLOT(Btn1_solt()));
}

Widget::~Widget()
{
    delete ui;
}
//触发自定义槽函数实现取消界面
void Widget::my_solt()
{
    //弹出提示问题图标对话框
   QMessageBox msg(QMessageBox::Question,"提示","您确定要退出登录?",QMessageBox::Yes |
                   QMessageBox::No,this);
               //调用exec()弹出对话框
              int ret = msg.exec();
   if(ret==QMessageBox::Yes)
   {
       //关闭窗口
       this->close();
   }
}

//自定义登录槽函数
void Widget::Btn1_solt()
{
    //判断账号密码是否正确
    if(ui->Edit1->text()== "admin" && ui->Edit2->text()== "123456")
    {
        //弹出信息对话框
        QMessageBox msg(QMessageBox::Information, "提示" , "登录成功",QMessageBox::Ok);
        int ret = msg.exec();
        if(ret == QMessageBox::Ok)
        {
            this->close(); //关闭界面
            emit my_jump();  //触发第二个界面的信号
        }
    }
    else {
        QMessageBox msg(QMessageBox::Critical, "错误" , "账号和密码不匹配。是否重新登录？" ,QMessageBox::Yes |
                        QMessageBox::No,this);
        int ret = msg.exec();
        if(ret == QMessageBox::Yes)
        {
            //清空密码和账号信息
            ui->Edit1->text().clear();
            ui->Edit2->text().clear();
        }else
        {
            this->close();
}
         }
}