Qt implements login verification function

Function description:

Enter the correct user name and password in the login interface to log in smoothly. If you make a mistake, you will be prompted to enter the username or password incorrectly.

Show results:

After entering the account password correctly:

Function realization:

It is mainly a slot function of the login button, according to whether ui->lineEdit->text().trimmed() is the desired account and password, then make a judgment, if the input is correct, execute the next step, otherwise a warning message will pop up, The account or password is entered incorrectly.

void Login::on_login_clicked()
{
    
    
    if(ui->lineEdit->text().trimmed() == tr("admin") && ui->lineEdit_2->text() == tr("admin"))
        {
    
    
            this->hide();
            ll.show();
            this->close();
        }
        else
        {
    
    
           QMessageBox mess(QMessageBox::Information,tr("Warning!"),tr("Wrong user name or password!"));
           mess.setWindowIcon(QIcon(":/main/logo"));
           mess.exec();

        // 清空输入框内容
           ui->lineEdit->clear();
           ui->lineEdit_2->clear();
           //光标定位
           ui->lineEdit->setFocus();
        }
}

Reference:
https://blog.csdn.net/nanfeibuyi/article/details/79959043
https://blog.csdn.net/qq_16488989/article/details/109024570