QT_day3 - 技术栈

cpp 复制代码

#ifndef SECOND_H
#define SECOND_H

#include <QWidget>

namespace Ui {
class Second;
}

class Second : public QWidget
{
    Q_OBJECT

public:
    explicit Second(QWidget *parent = nullptr);
    ~Second();
public slots:
    void jump();

private:
    Ui::Second *ui;
};

#endif // SECOND_H

cpp 复制代码

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QMessageBox>
#include <QDebug>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private slots:
    void on_close_btn_clicked();

    void on_pushButton_clicked();

    void on_cancle_clicked();


signals:
    void my_jump();

private:
    Ui::Widget *ui;
};
#endif // WIDGET_H

cpp 复制代码

#include "widget.h"
#include "second.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    Second s;
    QObject::connect(&w,&Widget::my_jump,&s,&Second::jump);
    w.show();
    return a.exec();
}

cpp 复制代码

#include "second.h"
#include "ui_second.h"

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

void Second::jump()
{
    this->show();
}
Second::~Second()
{
    delete ui;
}

cpp 复制代码

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

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->setWindowFlag(Qt::FramelessWindowHint);
    this->setAttribute(Qt::WA_TranslucentBackground);
}

Widget::~Widget()
{
    delete ui;
}
void Widget::on_close_btn_clicked()
{
    this->close();
}

void Widget::on_pushButton_clicked()
{
    int ret;
    QMessageBox login_success(QMessageBox::Information,"msg","登陆成功",QMessageBox::Ok,this);
    if(ui->username->text()=="admin" && ui->password->text() == "123456")
    {
        //对话框

        ret = login_success.exec();
        this->close();//关闭当前
        //跳转其他页面
        emit(Widget::my_jump());
    }else
    {
        ret = QMessageBox::information(this,"msg","账号密码不匹配，是否重新登陆？",QMessageBox::Yes | QMessageBox::No);
        if(ret == QMessageBox::Yes)
        {
            ui->password->clear();
        }else
        {
            this->close();
        }
    }
}

void Widget::on_cancle_clicked()
{
    int ret;
    ret = QMessageBox::question(this,"sure","是否确定退出登录？",QMessageBox::Yes | QMessageBox::No);
    if(ret == QMessageBox::Yes)
    {
        this->close();
    }
}