Qt练习--登录界面

1、登录界面：输入用户名和密码，正确则登陆进入主界面，失败则提示。

2、界面


3、逻辑处理

#include "logindialog.h"
#include "ui_logindialog.h"
#include <QLineEdit>
#include <QMessageBox>
LoginDialog::LoginDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::LoginDialog)
{
    ui->setupUi(this);
}

LoginDialog::~LoginDialog()
{
    delete ui;
}

void LoginDialog::loginButtonClickSlots()
{
    QLineEdit *usrName = ui->UserName;
    QLineEdit*passWord = ui->PassWord;

    if (usrName->text() == "xiaoming")
    {
        if(passWord->text() == "123456")
        {
            accept();
        }
        else
        {
            QMessageBox::warning(this,"waring","username or password error",QMessageBox::Yes);
        }
    }
    else
    {
        QMessageBox::warning(this,"waring","username or password error",QMessageBox::Yes);
    }
}

#include "widget.h"
#include <QApplication>
#include "logindialog.h"
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    LoginDialog loginWin;
    if (loginWin.exec() == QDialog::Accepted)
    {
        w.show();
        return a.exec();
    }
    return 0;
}

附加需求：
（1）密码用黑点显示，选项控制是否用黑点显示密码
设置密码LineEdit的echoMode属性是什么
（2）密码错误清除用户名和密码
LineEdit->clear()