QT第二天

要求：

运行结果：

 代码：

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include 

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
public slots:
    void rdBtnStateChangedSlotFun();
    void btnClickedslotFun();

private:
    Ui::Widget *ui;
};
#endif // WIDGET_H

widget.cpp

#include "widget.h"
#include "ui_widget.h"

#include 
#include 

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    ui->btn->setText("登录");
    ui->ltxtName->setPlaceholderText("请输入用户名");
    ui->ltxtPassword->setPlaceholderText("请输入密码");
    ui->ltxtPassword->setEchoMode(QLineEdit::Password);

    ui->rdBtnLogon->setChecked(true);

    connect(ui->ltxtPassword,SIGNAL(editingFinished()),this,SLOT(btnClickedslotFun()));
    connect(ui->rdBtnRegister,SIGNAL(clicked()),this,SLOT(rdBtnStateChangedSlotFun()));
    connect(ui->rdBtnLogon,SIGNAL(clicked()),this,SLOT(rdBtnStateChangedSlotFun()));
    connect(ui->btn,SIGNAL(clicked()),this,SLOT(btnClickedslotFun()));
}

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

void Widget::rdBtnStateChangedSlotFun()
{
    qDebug()<<__func__<<__LINE__;
    if(ui->rdBtnLogon->isChecked())
    {
        ui->btn->setText("登录");
    }
    if(ui->rdBtnRegister->isChecked())
    {
        ui->btn->setText("注册");
    }
}

void Widget::btnClickedslotFun()
{
    qDebug() << "用户名:" << ui->ltxtName->text();
    qDebug() << "密码:" << ui->ltxtPassword->text();
    if(ui->rdBtnLogon->isChecked())
    {
        qDebug() << "登录";
    }
    if(ui->rdBtnRegister->isChecked())
    {
        qDebug() << "注册";
    }
    if(ui->cbtnRemberPassword->isChecked())
    {
        qDebug() << "记住密码";
    }
    else
    {
        qDebug() << "取消记住密码";
    }

}

ui_widget.h

/********************************************************************************
** Form generated from reading UI file 'widget.ui'
**
** Created by: Qt User Interface Compiler version 5.12.9
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_WIDGET_H
#define UI_WIDGET_H

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

QT_BEGIN_NAMESPACE

class Ui_Widget
{
public:
    QLineEdit *ltxtName;
    QLineEdit *ltxtPassword;
    QLabel *label;
    QLabel *label_2;
    QPushButton *btn;
    QCheckBox *cbtnRemberPassword;
    QGroupBox *groupBox;
    QRadioButton *rdBtnLogon;
    QRadioButton *rdBtnRegister;

    void setupUi(QWidget *Widget)
    {
        if (Widget->objectName().isEmpty())
            Widget->setObjectName(QString::fromUtf8("Widget"));
        Widget->resize(360, 590);
        ltxtName = new QLineEdit(Widget);
        ltxtName->setObjectName(QString::fromUtf8("ltxtName"));
        ltxtName->setGeometry(QRect(100, 100, 220, 40));
        ltxtPassword = new QLineEdit(Widget);
        ltxtPassword->setObjectName(QString::fromUtf8("ltxtPassword"));
        ltxtPassword->setGeometry(QRect(100, 150, 220, 40));
        label = new QLabel(Widget);
        label->setObjectName(QString::fromUtf8("label"));
        label->setGeometry(QRect(50, 100, 50, 40));
        label_2 = new QLabel(Widget);
        label_2->setObjectName(QString::fromUtf8("label_2"));
        label_2->setGeometry(QRect(50, 150, 50, 40));
        btn = new QPushButton(Widget);
        btn->setObjectName(QString::fromUtf8("btn"));
        btn->setGeometry(QRect(105, 300, 150, 40));
        cbtnRemberPassword = new QCheckBox(Widget);
        cbtnRemberPassword->setObjectName(QString::fromUtf8("cbtnRemberPassword"));
        cbtnRemberPassword->setGeometry(QRect(60, 420, 120, 30));
        groupBox = new QGroupBox(Widget);
        groupBox->setObjectName(QString::fromUtf8("groupBox"));
        groupBox->setGeometry(QRect(60, 200, 241, 80));
        rdBtnLogon = new QRadioButton(groupBox);
        rdBtnLogon->setObjectName(QString::fromUtf8("rdBtnLogon"));
        rdBtnLogon->setGeometry(QRect(130, 20, 80, 30));
        rdBtnRegister = new QRadioButton(groupBox);
        rdBtnRegister->setObjectName(QString::fromUtf8("rdBtnRegister"));
        rdBtnRegister->setGeometry(QRect(30, 20, 80, 30));

        retranslateUi(Widget);

        QMetaObject::connectSlotsByName(Widget);
    } // setupUi

    void retranslateUi(QWidget *Widget)
    {
        Widget->setWindowTitle(QApplication::translate("Widget", "Widget", nullptr));
        label->setText(QApplication::translate("Widget", "\347\224\250\346\210\267\345\220\215", nullptr));
        label_2->setText(QApplication::translate("Widget", "\345\257\206    \347\240\201", nullptr));
        btn->setText(QApplication::translate("Widget", "\346\217\220\344\272\244", nullptr));
        cbtnRemberPassword->setText(QApplication::translate("Widget", "\350\256\260\344\275\217\345\257\206\347\240\201", nullptr));
        groupBox->setTitle(QString());
        rdBtnLogon->setText(QApplication::translate("Widget", "\347\231\273\345\275\225", nullptr));
        rdBtnRegister->setText(QApplication::translate("Widget", "\346\263\250\345\206\214", nullptr));
    } // retranslateUi

};

namespace Ui {
    class Widget: public Ui_Widget {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_WIDGET_H

main.cpp

#include "widget.h"

#include 

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}