qfedu-qt-level/Project02/mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->setWindowTitle("不知名系统");
    this->setWindowIcon(QIcon(":logo"));
}

MainWindow::~MainWindow()
{
    delete ui;
    delete register_widget; // 释放注册页
}

void MainWindow::on_registerBtn_clicked()
{
    register_widget = new RegisterWidget();
    register_widget->show();
}

void MainWindow::on_loginBtn_clicked()
{
    // debug 模式: 无密码登录
    //    emit this->login_success(); // 广播登录成功


    // 密码验证登录
    //    QString id = ui->idEdit->text();
    //    QString password = ui->passwordEdit->text();

    //    if(id == "123" && password == "321"){
    //        emit this->login_success(); // 广播登录成功
    //    }
    //    else{
    //        QMessageBox::critical(this,"账号或密码错误","请检查用户名或密码");
    //        return;
    //    }


    //    "./userdata.txt"
    QFile file("./userdata.txt");
    if(!file.open(QIODevice::ReadOnly|QIODevice::Text))
    {
        QMessageBox::warning(this,"警告","数据库为空，请先注册");
        return;
    }

    QTextStream in(&file);

    QString name = ui->idEdit->text();
    QString pwd = ui->passwordEdit->text();

    QString line = "";
    while((line = in.readLine()) != "")
    {
        qDebug() <<line;
        QStringList lineInfo = line.split(",");
        if(lineInfo.contains(name)&&lineInfo.contains(pwd))
        {
            emit this->login_success(); // 广播登录成功
            break;
        }
    }
    file.close();
}

void MainWindow::on_clearBtn_clicked()
{
    ui->idEdit->clear();
    ui->passwordEdit->clear();
}

void MainWindow::on_exitBtn_clicked()
{
    this->close();
}