Question

我正在尝试在qt中实现登录页面并陷入一个奇怪的问题。我想检查两种类型的密码。一个是常规密码，第二个是masterpassword。当使用者输入错误密码5次时，他必须输入主密码，如果他输入3个错误密码，则显示错误。

我已编写代码，但面临一个我无法解决的问题。这是我的登录代码：

d = df.groupby('number').name.apply(list).to_dict()

df = pd.DataFrame({k : pd.Series(v) 
       for k, v in d.items()}).add_prefix('num').fillna('')

print(df)
    num1   num2  num3
0    Bob  David  Jane
1   Mike   Josh      
2  Emily

我只想在第一个函数中的尝试等于5时调用第二个函数。但是在5个循环之后，我的代码调用第二个函数，但它然后同时运行第一个函数和第二个函数。谁能告诉我我做错了什么？我试图将函数组合在一起，并试图在第一个函数中使用第二个函数作为嵌套循环，但即使我将它设置在“if循环”条件内，它仍然会调用整个函数：

void FormLogin::OnLogin()
{
    QString password = passLineEdit->text();

    // Checking if username or password is empty
    if (password.isEmpty())
        {QMessageBox::information(this, tr("Warning!"), "Password field is empty!");
    } else if (password == "pass")
    {this->destroy();
    } else {
    QMessageBox::information(this, tr("Warning!"), QString("Wrong password!!! Only %1 attempt(s) left!").arg(4-attempt));
    attempt++;
    if (attempt == 5){
        QMessageBox::information(this, tr("Warning!"), QString("The device is locked due to too many failed attempts. Please enter the master password to unlock the device now."));
        connect(loginButton, SIGNAL(clicked()), this, SLOT(OnMasterLogin()));
        return;}
        }       
}

void FormLogin::OnMasterLogin()
{

    QString mpassword = passLineEdit->text();

    // Checking if username or password is empty
    if (mpassword.isEmpty())
        {QMessageBox::information(this, tr("Warning!"), "MPassword field is empty!");
    } else if (mpassword == "masterpass")
    {this->destroy();
    } else {
    QMessageBox::information(this, tr("Warning!"), QString("Wrong mpassword!!! Only %1 attempt(s) left!").arg(2-master_attempt));
    master_attempt++;
    if (master_attempt == 3){
    QMessageBox::information(this, tr("Warning!"), QString("The device is permanently locked due to too many failed attempts. Please contact the device manufacturer."));}}

}

使用以下代码调用第一个函数：

void FormLogin::OnLogin()
{
    QString password = passLineEdit->text();

    // Checking if username or password is empty
    if (password.isEmpty())
        {QMessageBox::information(this, tr("Warning!"), "Password field is empty!");
    } else if (password == "pass")
    {this->destroy();
    } else {
    QMessageBox::information(this, tr("Warning!"), QString("Wrong password!!! Only %1 attempt(s) left!").arg(4-attempt));
    attempt++;
    if (attempt == 5){
        QMessageBox::information(this, tr("Warning!"), QString("The device is locked due to too many failed attempts. Please enter the master password to unlock the device now."));
        QString mpassword = passLineEdit->text(); 
        // Checking if username or password is empty
        if (mpassword.isEmpty())
            {QMessageBox::information(this, tr("Warning!"), "MPassword field is empty!");
        } else if (mpassword == "masterpass")
            {this->destroy();
        } else {
            QMessageBox::information(this, tr("Warning!"), QString("Wrong mpassword!!! Only %1 attempt(s) left!").arg(2-master_attempt));
            master_attempt++;
            if (master_attempt == 3){
            QMessageBox::information(this, tr("Warning!"), QString("The device is permanently locked due to too many failed attempts. Please contact the device manufacturer."));}}}
        }       
}

任何建议都受到高度赞赏。

Answer 1

我假设您已经将loginButton :: clicked（）连接到FormLogin :: OnLogin（）。在该方法中，在五次尝试时，您添加另一个连接到FormLogin :: OnMasterLogin（），但您仍保留原始连接。如果当前处于“主登录”模式，请使用disconnect（）或向FormLogin :: OnLogin（）添加逻辑以进行挽救。

Answer 2

您可以在调用第一个函数之前添加if (attempt < 5)条件。如果达到5次尝试，这应该防止进入第一个功能。

从另一个函数的“if循环”内调用/移动函数 - Qt，C ++

2 个答案: