QT登录功能实现

 .h

#ifndef WIDGET_H
#define WIDGET_H
 
#include 
#include 
#include 
#include 
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
 
class Widget : public QWidget
{
    Q_OBJECT
 
 signals:
    void jump();     //跳转页面的自定义函数
public slots:
    void login_solt();    //登录页面的自定义的槽函数
public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
 
private:
    Ui::Widget *ui;
};
#endif // WIDGET_H

 .cpp

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    s =  new client;
    //更改窗口标题
    this->setWindowTitle("光与夜之恋");
    //logo图
    ui->logo->setPixmap(QPixmap(":/qt/a1.webp"));
    ui->logo->setScaledContents(true);
    //用户名密码图
    ui->userNamelab->setPixmap(QPixmap(":/qt/q1.webp"));
    ui->userNamelab->setScaledContents(true);
 
    ui->pwdlab->setPixmap(QPixmap(":/qt/2.webp"));
    ui->pwdlab->setScaledContents(true);
 
    //设置账户密码
 
    ui->pwdEdit->setPlaceholderText("密码");
    ui->pwdEdit->setEchoMode(QLineEdit::Password);
 
 
    //将登录按钮连接到自定义的槽函数中
    connect(ui->loginBtn,&QPushButton::clicked,this,&Widget::login_solt);
    //将取消按钮连接到自定义的槽函数中
     connect(ui->cancleBtn,SIGNAL(clicked()),this,SLOT(close()));
 
     connect(this, &Widget::jump, s, &client::jump_slot);
 
 
}
 
Widget::~Widget()
{
    delete ui;
}
 
void Widget::login_solt()
{
    QString username=ui->userNameEdit->text();
    QString pwd=ui->pwdEdit->text();
 
}
 
 
void Widget::on_loginBtn_clicked()
{
    QString username=ui->userNameEdit->text();
    QString pwd=ui->pwdEdit->text();
    if(username=="admin"&&pwd=="123456")
    {
        qDebug()<<"登录成功";
        int ret =QMessageBox::information(this,"提示","登录成功",QMessageBox::Ok);
 
        if(ret==QMessageBox::Ok)
        {
           emit jump();
            this->close();
        }
     }else
    {
        //qDebug()<<"账号密码不匹配，请重新登录！";
        int ret =QMessageBox::critical(this,"提示","登录成功",QMessageBox::Yes|QMessageBox::No);
 
        if(ret==QMessageBox::Yes)
        {
                //清除密码框内容
            ui->pwdEdit->clear();
        }
        else
        {
            this->close();
        }
    }
}
 
void Widget::on_cancleBtn_clicked()
{
 
}
 

 main

#include "widget.h"
 
#include 
#include "client.h"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    client s;
    QObject::connect(&w,&Widget::login_solt,&s,&client::jump_slot);
    return a.exec();
}

 .h

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

#include "client.h"
#include "ui_client.h"
 
client::client(QWidget *parent) :
    QDockWidget(parent),
    ui(new Ui::client)
{
    ui->setupUi(this);
    //更改窗口标题
    this->setWindowTitle("光与夜之恋");
    //logo图
    ui->logo->setPixmap(QPixmap(":/qt/592587c702e7f7674a6c7fa72fe21169.jpg"));
    ui->logo->setScaledContents(true);
 
}
 
client::~client()
{
    delete ui;
}
void client::jump_slot()
{
    this->show();
}