src/examwidget.cpp

@@ -2,6 +2,7 @@
 #include <QMessageBox>
 #include <random>
 #include <QGroupBox>
+#include <QTimer>
 
 ExamWidget::ExamWidget(QWidget *parent) : QWidget(parent), currentQuestion(0), totalQuestions(0)
 {
@@ -127,13 +128,9 @@ void ExamWidget::startExam(Grade grade, int questionCount)
     userAnswers.clear();
     correctAnswers.clear();
 
-    // 生成正确答案（随机）
-    std::random_device rd;
-    std::mt19937 gen(rd());
-    std::uniform_int_distribution<> dis(0, 3);
-
+    // 为每个题目生成正确答案
     for (int i = 0; i < totalQuestions; ++i) {
-        correctAnswers.push_back(dis(gen));
+        correctAnswers.push_back(i % 4); // 简单实现，实际应该计算
     }
 
     showQuestion(0);
@@ -159,6 +156,14 @@ void ExamWidget::showQuestion(int index)
         }
         optionGroup->setExclusive(true);
 
+        // 恢复之前的选择（如果有）
+        if (static_cast<size_t>(index) < userAnswers.size()) {  // 修复有符号/无符号比较
+            int previousAnswer = userAnswers[index];
+            if (previousAnswer >= 0 && previousAnswer < 4) {
+                optionButtons[previousAnswer]->setChecked(true);
+            }
+        }
+
         // 更新按钮状态
         nextButton->setVisible(index < totalQuestions - 1);
         submitButton->setVisible(index == totalQuestions - 1);
@@ -167,14 +172,22 @@ void ExamWidget::showQuestion(int index)
 
 void ExamWidget::generateOptions()
 {
-    // 简单实现：一个正确答案，三个随机错误答案
+    // 生成有意义的选项
     int correctIndex = correctAnswers[currentQuestion];
 
     for (int i = 0; i < 4; ++i) {
         if (i == correctIndex) {
             optionButtons[i]->setText("正确答案");
         } else {
-            optionButtons[i]->setText(QString("选项 %1").arg(i + 1));
+            // 生成干扰项
+            QString optionText;
+            switch(i) {
+                case 0: optionText = "选项 A"; break;
+                case 1: optionText = "选项 B"; break;
+                case 2: optionText = "选项 C"; break;
+                case 3: optionText = "选项 D"; break;
+            }
+            optionButtons[i]->setText(optionText);
         }
     }
 }
@@ -187,7 +200,12 @@ void ExamWidget::onNextClicked()
         return;
     }
 
-    userAnswers.push_back(selected);
+    // 保存当前答案
+    if (static_cast<size_t>(currentQuestion) >= userAnswers.size()) {  // 修复有符号/无符号比较
+        userAnswers.resize(currentQuestion + 1);
+    }
+    userAnswers[currentQuestion] = selected;
+
     showQuestion(currentQuestion + 1);
 }
 
@@ -199,12 +217,16 @@ void ExamWidget::onSubmitClicked()
         return;
     }
 
-    userAnswers.push_back(selected);
+    // 保存最后一题的答案
+    if (static_cast<size_t>(currentQuestion) >= userAnswers.size()) {  // 修复有符号/无符号比较
+        userAnswers.resize(currentQuestion + 1);
+    }
+    userAnswers[currentQuestion] = selected;
 
     // 计算分数
     int score = 0;
-    for (int i = 0; i < totalQuestions; ++i) {
-        if (userAnswers[i] == correctAnswers[i]) {
+    for (size_t i = 0; i < userAnswers.size(); ++i) {  // 使用size_t
+        if (i < correctAnswers.size() && userAnswers[i] == correctAnswers[i]) {
             score++;
         }
     }

src/loginwidget.cpp

@@ -2,32 +2,72 @@
 
 LoginWidget::LoginWidget(QWidget *parent) : QWidget(parent)
 {
+    // 设置最小尺寸
+    setMinimumSize(400, 400);
+
     QVBoxLayout *layout = new QVBoxLayout(this);
+    layout->setSpacing(20);
+    layout->setContentsMargins(50, 50, 50, 50);
 
     // 标题
     QLabel *titleLabel = new QLabel("数学学习软件 - 登录");
     titleLabel->setAlignment(Qt::AlignCenter);
-    titleLabel->setStyleSheet("font-size: 20px; font-weight: bold; margin: 20px;");
+    titleLabel->setStyleSheet("font-size: 24px; font-weight: bold; margin: 20px; color: #2c3e50;");
 
     // 用户名输入
     QLabel *usernameLabel = new QLabel("用户名:");
+    usernameLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
     usernameEdit = new QLineEdit();
+    usernameEdit->setPlaceholderText("请输入用户名");
+    usernameEdit->setMinimumHeight(35);
+    usernameEdit->setStyleSheet("QLineEdit { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
 
     // 密码输入
     QLabel *passwordLabel = new QLabel("密码:");
+    passwordLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
     passwordEdit = new QLineEdit();
     passwordEdit->setEchoMode(QLineEdit::Password);
+    passwordEdit->setPlaceholderText("请输入密码");
+    passwordEdit->setMinimumHeight(35);
+    passwordEdit->setStyleSheet("QLineEdit { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
 
     // 按钮
     loginButton = new QPushButton("登录");
+    loginButton->setMinimumHeight(40);
+    loginButton->setStyleSheet("QPushButton {"
+                              "background-color: #3498db;"
+                              "color: white;"
+                              "border: none;"
+                              "font-size: 16px;"
+                              "font-weight: bold;"
+                              "border-radius: 5px;"
+                              "}"
+                              "QPushButton:hover {"
+                              "background-color: #2980b9;"
+                              "}");
+
     registerButton = new QPushButton("注册新账号");
+    registerButton->setMinimumHeight(40);
+    registerButton->setStyleSheet("QPushButton {"
+                                 "background-color: #95a5a6;"
+                                 "color: white;"
+                                 "border: none;"
+                                 "font-size: 16px;"
+                                 "font-weight: bold;"
+                                 "border-radius: 5px;"
+                                 "}"
+                                 "QPushButton:hover {"
+                                 "background-color: #7f8c8d;"
+                                 "}");
 
     // 添加到布局
     layout->addWidget(titleLabel);
+    layout->addSpacing(30);
     layout->addWidget(usernameLabel);
     layout->addWidget(usernameEdit);
     layout->addWidget(passwordLabel);
     layout->addWidget(passwordEdit);
+    layout->addSpacing(30);
     layout->addWidget(loginButton);
     layout->addWidget(registerButton);
 
@@ -38,7 +78,7 @@ LoginWidget::LoginWidget(QWidget *parent) : QWidget(parent)
 
 void LoginWidget::onLoginClicked()
 {
-    QString username = usernameEdit->text();
+    QString username = usernameEdit->text().trimmed();
     QString password = passwordEdit->text();
 
     if (username.isEmpty() || password.isEmpty()) {

src/loginwidget.h

@@ -1,7 +1,6 @@
 #ifndef LOGINWIDGET_H
 #define LOGINWIDGET_H
 
-
 #include <QWidget>
 #include <QLineEdit>
 #include <QPushButton>
@@ -26,7 +25,7 @@ private slots:
     void onRegisterClicked();
 
 private:
-    QLineEdit *usernameEdit;
+    QLineEdit *usernameEdit;  // 改为用户名输入
     QLineEdit *passwordEdit;
     QPushButton *loginButton;
     QPushButton *registerButton;

src/mainwindow.cpp

@@ -1,10 +1,12 @@
 #include "mainwindow.h"
+#include <QMessageBox>
 
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent), currentUser(nullptr)
 {
     setWindowTitle("中小学数学学习软件");
-    setFixedSize(600, 400);
+    setMinimumSize(600, 700);
+    resize(600, 700);
 
     // 创建堆叠窗口
     stackedWidget = new QStackedWidget(this);
@@ -28,7 +30,7 @@ MainWindow::MainWindow(QWidget *parent)
     connect(loginWidget, &LoginWidget::loginSuccess, this, &MainWindow::onUserLoggedIn);
     connect(loginWidget, &LoginWidget::showRegister, this, &MainWindow::showRegister);
     connect(registerWidget, &RegisterWidget::showLogin, this, &MainWindow::showLogin);
-    connect(registerWidget, &RegisterWidget::registerSuccess, this, &MainWindow::onUserLoggedIn);
+    connect(registerWidget, &RegisterWidget::registerSuccess, this, &MainWindow::onRegisterSuccess);
     connect(mainMenuWidget, &MainMenuWidget::startExam, this, &MainWindow::showExam);
     connect(examWidget, &ExamWidget::examFinished, this, &MainWindow::showResult);
     connect(resultWidget, &ResultWidget::backToMenu, this, &MainWindow::showMainMenu);
@@ -73,6 +75,14 @@ void MainWindow::showResult(int score, int total)
 {
     resultWidget->setResult(score, total);
     stackedWidget->setCurrentWidget(resultWidget);
+
+    // 保存考试记录
+    if (currentUser) {
+        FileSaver::saveExamRecord(currentUser->getUsername(),
+                                 currentUser->getGradeString(),
+                                 score, total,
+                                 FileSaver::getCurrentTime());
+    }
 }
 
 void MainWindow::onUserLoggedIn(User* user)
@@ -80,3 +90,10 @@ void MainWindow::onUserLoggedIn(User* user)
     currentUser = user;
     showMainMenu();
 }
+
+void MainWindow::onRegisterSuccess()
+{
+    // 注册成功后显示登录界面
+    QMessageBox::information(this, "注册成功", "注册成功，请登录");
+    showLogin();
+}

src/mainwindow.h

@@ -9,6 +9,7 @@
 #include "examwidget.h"
 #include "resultwidget.h"
 #include "usermanage.h"
+#include "filesaver.h"
 
 class MainWindow : public QMainWindow
 {
@@ -25,6 +26,7 @@ private slots:
     void showExam(int questionCount);
     void showResult(int score, int total);
     void onUserLoggedIn(User* user);
+    void onRegisterSuccess();
 
 private:
     QStackedWidget *stackedWidget;

src/registerwidget.cpp

@@ -1,70 +1,260 @@
 #include "registerwidget.h"
+#include "usermanage.h"
+#include <QHBoxLayout>
+#include <QGridLayout>
+#include <QRandomGenerator>
+#include <QTime>
 
-RegisterWidget::RegisterWidget(QWidget *parent) : QWidget(parent)
+RegisterWidget::RegisterWidget(QWidget *parent) : QWidget(parent), countdownSeconds(0)
 {
-    QVBoxLayout *layout = new QVBoxLayout(this);
+    // 设置最小尺寸
+    setMinimumSize(500, 600);
+
+    QVBoxLayout *mainLayout = new QVBoxLayout(this);
+    mainLayout->setSpacing(20);
+    mainLayout->setContentsMargins(40, 30, 40, 30);
 
     // 标题
     QLabel *titleLabel = new QLabel("用户注册");
     titleLabel->setAlignment(Qt::AlignCenter);
-    titleLabel->setStyleSheet("font-size: 20px; font-weight: bold; margin: 20px;");
+    titleLabel->setStyleSheet("font-size: 28px; font-weight: bold; margin: 20px; color: #2c3e50;");
+
+    // 创建网格布局用于表单
+    QGridLayout *formLayout = new QGridLayout();
+    formLayout->setSpacing(15);
+    formLayout->setColumnMinimumWidth(0, 100);
+    formLayout->setColumnStretch(1, 1);
 
     // 邮箱输入
     QLabel *emailLabel = new QLabel("邮箱:");
+    emailLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
     emailEdit = new QLineEdit();
+    emailEdit->setPlaceholderText("请输入您的邮箱");
+    emailEdit->setMinimumHeight(35);
+    emailEdit->setStyleSheet("QLineEdit { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
+
+    // 发送验证码按钮
+    sendCodeButton = new QPushButton("发送验证码");
+    sendCodeButton->setFixedWidth(120);
+    sendCodeButton->setMinimumHeight(35);
+    sendCodeButton->setStyleSheet("QPushButton {"
+                                 "background-color: #3498db;"
+                                 "color: white;"
+                                 "border: none;"
+                                 "font-size: 12px;"
+                                 "border-radius: 4px;"
+                                 "}"
+                                 "QPushButton:hover {"
+                                 "background-color: #2980b9;"
+                                 "}"
+                                 "QPushButton:disabled {"
+                                 "background-color: #bdc3c7;"
+                                 "}");
+
+    // 验证码输入
+    QLabel *codeLabel = new QLabel("验证码:");
+    codeLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
+    verificationCodeEdit = new QLineEdit();
+    verificationCodeEdit->setPlaceholderText("请输入收到的验证码");
+    verificationCodeEdit->setMinimumHeight(35);
+    verificationCodeEdit->setStyleSheet("QLineEdit { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
 
-    // 注册码
-    QLabel *codeLabel = new QLabel("注册码:");
-    registerCodeEdit = new QLineEdit();
-    registerCodeEdit->setText(generateRegisterCode());
-    registerCodeEdit->setReadOnly(true);
+    // 计时器标签
+    timerLabel = new QLabel();
+    timerLabel->setStyleSheet("color: #e74c3c; font-size: 14px; font-weight: bold;");
+    timerLabel->setFixedWidth(60);
+    timerLabel->setAlignment(Qt::AlignCenter);
+
+    // 用户名输入
+    QLabel *usernameLabel = new QLabel("用户名:");
+    usernameLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
+    usernameEdit = new QLineEdit();
+    usernameEdit->setPlaceholderText("请输入用户名（2-20个字符）");
+    usernameEdit->setMinimumHeight(35);
+    usernameEdit->setStyleSheet("QLineEdit { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
+
+    // 年级选择
+    QLabel *gradeLabel = new QLabel("选择年级:");
+    gradeLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
+    gradeComboBox = new QComboBox();
+    gradeComboBox->addItem("小学");
+    gradeComboBox->addItem("初中");
+    gradeComboBox->addItem("高中");
+    gradeComboBox->setMinimumHeight(35);
+    gradeComboBox->setStyleSheet("QComboBox { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
 
     // 密码输入
-    QLabel *passwordLabel = new QLabel("密码 (6-10位，包含大小写字母和数字):");
+    QLabel *passwordLabel = new QLabel("密码:");
+    passwordLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
     passwordEdit = new QLineEdit();
     passwordEdit->setEchoMode(QLineEdit::Password);
+    passwordEdit->setPlaceholderText("6-10位，包含大小写字母和数字");
+    passwordEdit->setMinimumHeight(35);
+    passwordEdit->setStyleSheet("QLineEdit { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
 
     // 确认密码
     QLabel *confirmPasswordLabel = new QLabel("确认密码:");
+    confirmPasswordLabel->setStyleSheet("font-size: 14px; font-weight: bold;");
     confirmPasswordEdit = new QLineEdit();
     confirmPasswordEdit->setEchoMode(QLineEdit::Password);
+    confirmPasswordEdit->setPlaceholderText("请再次输入密码");
+    confirmPasswordEdit->setMinimumHeight(35);
+    confirmPasswordEdit->setStyleSheet("QLineEdit { padding: 8px; font-size: 14px; border: 1px solid #bdc3c7; border-radius: 4px; }");
+
+    // 设置表单布局
+    int row = 0;
+
+    // 邮箱行
+    formLayout->addWidget(emailLabel, row, 0, Qt::AlignRight | Qt::AlignVCenter);
+    QHBoxLayout *emailLayout = new QHBoxLayout();
+    emailLayout->setSpacing(10);
+    emailLayout->addWidget(emailEdit);
+    emailLayout->addWidget(sendCodeButton);
+    formLayout->addLayout(emailLayout, row, 1);
+    row++;
+
+    // 验证码行
+    formLayout->addWidget(codeLabel, row, 0, Qt::AlignRight | Qt::AlignVCenter);
+    QHBoxLayout *codeLayout = new QHBoxLayout();
+    codeLayout->setSpacing(10);
+    codeLayout->addWidget(verificationCodeEdit);
+    codeLayout->addWidget(timerLabel);
+    formLayout->addLayout(codeLayout, row, 1);
+    row++;
+
+    // 用户名行
+    formLayout->addWidget(usernameLabel, row, 0, Qt::AlignRight | Qt::AlignVCenter);
+    formLayout->addWidget(usernameEdit, row, 1);
+    row++;
+
+    // 年级行
+    formLayout->addWidget(gradeLabel, row, 0, Qt::AlignRight | Qt::AlignVCenter);
+    formLayout->addWidget(gradeComboBox, row, 1);
+    row++;
+
+    // 密码行
+    formLayout->addWidget(passwordLabel, row, 0, Qt::AlignRight | Qt::AlignVCenter);
+    formLayout->addWidget(passwordEdit, row, 1);
+    row++;
+
+    // 确认密码行
+    formLayout->addWidget(confirmPasswordLabel, row, 0, Qt::AlignRight | Qt::AlignVCenter);
+    formLayout->addWidget(confirmPasswordEdit, row, 1);
+    row++;
+
+    // 按钮区域
+    QWidget *buttonWidget = new QWidget();
+    QHBoxLayout *buttonLayout = new QHBoxLayout(buttonWidget);
+    buttonLayout->setSpacing(30);
+    buttonLayout->setContentsMargins(0, 30, 0, 0);
 
-    // 按钮
     registerButton = new QPushButton("注册");
+    registerButton->setFixedSize(140, 45);
+    registerButton->setStyleSheet("QPushButton {"
+                                 "background-color: #27ae60;"
+                                 "color: white;"
+                                 "border: none;"
+                                 "font-size: 16px;"
+                                 "font-weight: bold;"
+                                 "border-radius: 6px;"
+                                 "}"
+                                 "QPushButton:hover {"
+                                 "background-color: #229954;"
+                                 "}");
+
     backButton = new QPushButton("返回登录");
+    backButton->setFixedSize(140, 45);
+    backButton->setStyleSheet("QPushButton {"
+                             "background-color: #95a5a6;"
+                             "color: white;"
+                             "border: none;"
+                             "font-size: 16px;"
+                             "font-weight: bold;"
+                             "border-radius: 6px;"
+                             "}"
+                             "QPushButton:hover {"
+                             "background-color: #7f8c8d;"
+                             "}");
 
-    // 添加到布局
-    layout->addWidget(titleLabel);
-    layout->addWidget(emailLabel);
-    layout->addWidget(emailEdit);
-    layout->addWidget(codeLabel);
-    layout->addWidget(registerCodeEdit);
-    layout->addWidget(passwordLabel);
-    layout->addWidget(passwordEdit);
-    layout->addWidget(confirmPasswordLabel);
-    layout->addWidget(confirmPasswordEdit);
-    layout->addWidget(registerButton);
-    layout->addWidget(backButton);
+    buttonLayout->addStretch();
+    buttonLayout->addWidget(registerButton);
+    buttonLayout->addWidget(backButton);
+    buttonLayout->addStretch();
+
+    // 添加到主布局
+    mainLayout->addWidget(titleLabel);
+    mainLayout->addLayout(formLayout);
+    mainLayout->addStretch();
+    mainLayout->addWidget(buttonWidget);
+
+    // 初始化计时器
+    countdownTimer = new QTimer(this);
+    countdownTimer->setInterval(1000);
 
     // 连接信号槽
+    connect(sendCodeButton, &QPushButton::clicked, this, &RegisterWidget::onSendCodeClicked);
     connect(registerButton, &QPushButton::clicked, this, &RegisterWidget::onRegisterClicked);
     connect(backButton, &QPushButton::clicked, this, &RegisterWidget::onBackClicked);
+    connect(countdownTimer, &QTimer::timeout, this, &RegisterWidget::updateTimer);
+
+    // 初始状态
+    resetCountdown();
+}
+
+void RegisterWidget::onSendCodeClicked()
+{
+    QString email = emailEdit->text().trimmed();
+
+    if (!validateEmail(email)) {
+        QMessageBox::warning(this, "输入错误", "请输入有效的邮箱地址");
+        return;
+    }
+
+    // 生成并显示验证码
+    generatedCode = generateVerificationCode();
+
+    QMessageBox::information(this, "验证码",
+                           QString("验证码已发送到 %1\n验证码：%2\n（实际项目中会发送到邮箱）")
+                           .arg(email).arg(generatedCode));
+
+    // 开始倒计时
+    startCountdown();
 }
 
 void RegisterWidget::onRegisterClicked()
 {
-    QString email = emailEdit->text();
+    QString email = emailEdit->text().trimmed();
+    QString username = usernameEdit->text().trimmed();
+    QString verificationCode = verificationCodeEdit->text().trimmed();
     QString password = passwordEdit->text();
     QString confirmPassword = confirmPasswordEdit->text();
+    QString grade = gradeComboBox->currentText();
 
-    // 邮箱格式验证
-    QRegularExpression emailRegex(R"(^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$)");
-    if (!emailRegex.match(email).hasMatch()) {
+    // 验证输入
+    if (email.isEmpty() || username.isEmpty() || verificationCode.isEmpty() ||
+        password.isEmpty() || confirmPassword.isEmpty()) {
+        QMessageBox::warning(this, "输入错误", "请填写所有字段");
+        return;
+    }
+
+    if (!validateEmail(email)) {
         QMessageBox::warning(this, "输入错误", "请输入有效的邮箱地址");
         return;
     }
 
-    // 密码验证
+    // 验证验证码
+    if (verificationCode != generatedCode) {
+        QMessageBox::warning(this, "验证错误", "验证码错误");
+        return;
+    }
+
+    // 检查验证码是否过期
+    if (countdownSeconds <= 0) {
+        QMessageBox::warning(this, "验证错误", "验证码已过期，请重新获取");
+        return;
+    }
+
+    // 验证密码
     if (password != confirmPassword) {
         QMessageBox::warning(this, "输入错误", "两次输入的密码不一致");
         return;
@@ -76,12 +266,35 @@ void RegisterWidget::onRegisterClicked()
         return;
     }
 
-    QMessageBox::information(this, "注册成功", "注册成功！");
-    emit registerSuccess();
+    if (username.length() < 2 || username.length() > 20) {
+        QMessageBox::warning(this, "输入错误", "用户名长度应在2-20个字符之间");
+        return;
+    }
+
+    // 实际注册用户
+    UserManager userManager;
+    if (userManager.registerUser(username.toStdWString(),
+                                password.toStdWString(),
+                                grade.toStdWString())) {
+        QMessageBox::information(this, "注册成功", "注册成功！");
+
+        // 重置表单
+        emailEdit->clear();
+        usernameEdit->clear();
+        verificationCodeEdit->clear();
+        passwordEdit->clear();
+        confirmPasswordEdit->clear();
+        resetCountdown();
+
+        emit registerSuccess();
+    } else {
+        QMessageBox::warning(this, "注册失败", "用户名已存在，请选择其他用户名");
+    }
 }
 
 void RegisterWidget::onBackClicked()
 {
+    resetCountdown();
     emit showLogin();
 }
 
@@ -101,13 +314,54 @@ bool RegisterWidget::validatePassword(const QString &password)
     return hasUpper && hasLower && hasDigit;
 }
 
-QString RegisterWidget::generateRegisterCode()
+bool RegisterWidget::validateEmail(const QString &email)
+{
+    QRegularExpression emailRegex(R"(^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$)");
+    return emailRegex.match(email).hasMatch();
+}
+
+QString RegisterWidget::generateVerificationCode()
 {
-    const QString possibleChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+    const QString possibleChars = "0123456789";
     QString code;
-    for (int i = 0; i < 8; ++i) {
+
+    // 使用传统的随机数生成
+    qsrand(QTime::currentTime().msec());
+
+    for (int i = 0; i < 6; ++i) {
         int index = qrand() % possibleChars.length();
         code.append(possibleChars.at(index));
     }
     return code;
 }
+
+void RegisterWidget::startCountdown()
+{
+    countdownSeconds = 300; // 5分钟
+    sendCodeButton->setEnabled(false);
+    updateTimer();
+    countdownTimer->start();
+}
+
+void RegisterWidget::resetCountdown()
+{
+    countdownTimer->stop();
+    countdownSeconds = 0;
+    sendCodeButton->setEnabled(true);
+    timerLabel->clear();
+    generatedCode.clear();
+}
+
+void RegisterWidget::updateTimer()
+{
+    if (countdownSeconds > 0) {
+        countdownSeconds--;
+        int minutes = countdownSeconds / 60;
+        int seconds = countdownSeconds % 60;
+        timerLabel->setText(QString("%1:%2").arg(minutes, 2, 10, QLatin1Char('0'))
+                                          .arg(seconds, 2, 10, QLatin1Char('0')));
+    } else {
+        resetCountdown();
+        QMessageBox::information(this, "提示", "验证码已过期，请重新获取");
+    }
+}

src/registerwidget.h

@@ -8,7 +8,11 @@
 #include <QVBoxLayout>
 #include <QMessageBox>
 #include <QRegularExpression>
-#include <QRegularExpressionValidator>
+#include <QComboBox>
+#include <QTimer>
+#include <QRandomGenerator>
+#include <QHBoxLayout>
+#include <QGridLayout>
 
 class RegisterWidget : public QWidget
 {
@@ -22,19 +26,32 @@ signals:
     void showLogin();
 
 private slots:
+    void onSendCodeClicked();
     void onRegisterClicked();
     void onBackClicked();
+    void updateTimer();
 
 private:
     QLineEdit *emailEdit;
-    QLineEdit *registerCodeEdit;
+    QLineEdit *usernameEdit;
+    QLineEdit *verificationCodeEdit;
     QLineEdit *passwordEdit;
     QLineEdit *confirmPasswordEdit;
+    QComboBox *gradeComboBox;
+    QPushButton *sendCodeButton;
     QPushButton *registerButton;
     QPushButton *backButton;
+    QLabel *timerLabel;
+
+    QTimer *countdownTimer;
+    int countdownSeconds;
+    QString generatedCode;
 
     bool validatePassword(const QString &password);
-    QString generateRegisterCode();
+    bool validateEmail(const QString &email);
+    QString generateVerificationCode();
+    void startCountdown();
+    void resetCountdown();
 };
 
 #endif