QT--day2

form.h

#ifndef FORM_H
#define FORM_H
 
#include 
#include
#include
#include
#include 
#include
namespace Ui {
class Form;
}
 
class Form : public QWidget
{
    Q_OBJECT
 
public:
    explicit Form(QWidget *parent = nullptr);
    ~Form();
 
private:
    Ui::Form *ui;
public slots:
    void jump_slot();
};
 
#endif // FORM_H

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include 
#include
#include
#include
#include 
#include
#include "form.h"
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
 
private:
    Ui::MainWindow *ui;
    QLineEdit *zh;
    QLineEdit *mm;
    Form *f1;
signals:
    void my_sig();
    void jump();
public slots:
    void btn1_slot();
    void btn2_slot();
};
#endif // MAINWINDOW_H

form.cpp

#include "form.h"
#include "ui_form.h"
 
Form::Form(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Form)
{
    ui->setupUi(this);
}
 
Form::~Form()
{
    delete ui;
}
void Form::jump_slot()
{
    show();
}

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    //设置固定大小
    this->setFixedSize(400,300);
    //设置窗口标题
    this->setWindowTitle("HUAQI");
    //设置窗口图标
    this->setWindowIcon(QIcon("D:\\Qt\\icon\\icon\\wodepeizhenshi.png"));
    //构建两个按钮
    QPushButton *btn1=new QPushButton(QIcon("D:\\Qt\\icon\\icon\\login.png"),"登录",this);
    btn1->resize(100,40);
    btn1->move(100,250);
 
    QPushButton *btn2=new QPushButton(QIcon("D:\\Qt\\icon\\icon\\cancel.png"),"取消",this);
    btn2->resize(btn1->size());
    btn2->move(btn1->x()+150,btn1->y());
    connect(btn2,SIGNAL(clicked()),this,SLOT(btn2_slot()));
    //构建两个行编辑器
    QLineEdit *edit1=new QLineEdit(this);
    edit1->resize(200,30);
    edit1->setEchoMode(QLineEdit::Password);
    edit1->setText("123456");
    edit1->move(125,btn1->y()-50);
    QLineEdit *edit2=new QLineEdit(this);
    edit2->resize(200,30);
    edit2->setText("admin");
    edit2->move(125,edit1->y()-50);
    //构建三个标签
    QLabel *lab1=new QLabel(this);
    lab1->resize(30,30);
    lab1->setPixmap(QPixmap("D:\\Qt\\icon\\icon\\passwd.jpg"));
    lab1->setScaledContents(true);
    lab1->move(edit1->x()-40,edit1->y());
 
    QLabel *lab2=new QLabel(this);
    lab2->resize(lab1->size());
    lab2->setPixmap(QPixmap("D:\\Qt\\icon\\icon\\userName.jpg"));
    lab2->setScaledContents(true);
    lab2->move(edit2->x()-40,edit2->y());
 
    QLabel *lab3=new QLabel(this);
    lab3->resize(400,120);
    lab3->setPixmap(QPixmap("D:\\Qt\\icon\\icon\\logo.png"));
    lab3->setScaledContents(true);
 
    connect(btn1,&QPushButton::clicked,this,&MainWindow::btn1_slot);
    zh=edit2;
    mm=edit1;
 
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::btn1_slot()
{
 
    if(mm->text()=="123456"&&zh->text()=="admin")
    {
        QMessageBox box(QMessageBox::NoIcon,
                        "成功",
                        "登陆成功",
                        QMessageBox::Ok,
                        this);
        int ret=box.exec();
        if(ret==QMessageBox::Ok)
        {
            emit jump();
        }
        //静态
        //QMessageBox box(this,
        //                     "成功",
        //                     "登陆成功",
          //                   QMessageBox::Ok,
        //                     QMessageBox::Ok);
                    //          int ret=box.exec();
        //                      if(ret==QMessageBox::Ok)
        //                       {
        //
        //                                emit jump();
        //                            }
    }else
    {
        QMessageBox box(QMessageBox::Warning,
                        "错误",
                        "账号或密码出错",
                        QMessageBox::Yes|QMessageBox::No,
                        this);
 
        box.setButtonText(QMessageBox::Yes,"继续");
        box.setButtonText(QMessageBox::No,"取消");
 
        int ret=box.exec();
        if(ret==QMessageBox::Yes)
        {
 
        }else
        {
            this->close();
        }
        //静态
        //int ret=QMessageBox::warning(this,
        //                     "错误",
        //                     "账号或密码出错",
          //                   QMessageBox::Yes|QMessageBox::No,
        //                     QMessageBox::No);
        //                      if(ret==QMessageBox::Yes)
        //                       {
 
        //                            }else
        //                            {
        //                                this->close();
        //                            }
    }
 
}
 
void MainWindow::btn2_slot()
{
    QMessageBox box(QMessageBox::Question,
                    "退出",
                    "确定要退出吗？",
                    QMessageBox::Yes|QMessageBox::No,
                    this);
    int ret=box.exec();
    if(ret==QMessageBox::Yes)
    {
        this->close();
    }
    //静态
    //int ret=QMessageBox::warning(this,
    //                     "退出",
    //                     "确定要退出吗？",
      //                   QMessageBox::Yes|QMessageBox::No,
    //                     QMessageBox::No);
    //                      if(ret==QMessageBox::Yes)
    //                       {
    //
    //                                this->close();
    //                            }
}

main.cpp

#include "mainwindow.h"
#include "form.h"
#include 
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    Form f1;
    //连接W的信号和S的槽
    QObject::connect(&w,&MainWindow::jump,&f1,&Form::jump_slot);
    return a.exec();
}