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升级优化自己应用程序的登录界面。

要求： 1. qss实现

2. 需要有图层的叠加 （QFrame）

3. 设置纯净窗口后，有关闭等窗口功能。

4. 如果账号密码正确，则实现登录界面关闭，另一个应用界面显示。

//发送端头文件#ifndef MYWIDGET_H
#define MYWIDGET_H#include <QWidget>QT_BEGIN_NAMESPACE
namespace Ui { class MyWidget; }
QT_END_NAMESPACEclass MyWidget : public QWidget
{Q_OBJECTpublic:MyWidget(QWidget *parent = nullptr);~MyWidget();private slots:void on_pushButton_clicked();void on_pushButton_2_clicked();void on_pushButton_3_clicked();void on_pushButton_4_clicked();signals:void my_signal_1();void my_signal_2();void my_jump();private:Ui::MyWidget *ui;QPalette color;
};
#endif // MYWIDGET_H//发送端源文件#include "mywidget.h"
#include "ui_mywidget.h"MyWidget::MyWidget(QWidget *parent): QWidget(parent), ui(new Ui::MyWidget)
{ui->setupUi(this);this->setWindowFlag(Qt::FramelessWindowHint);this->setAttribute(Qt::WA_TranslucentBackground);connect(this,&MyWidget::my_signal_1,[=](){this->showMinimized();});connect(this,&MyWidget::my_signal_2,[=](){if(this->window()->isMaximized()){this->showNormal();}else{this->showMaximized();}});
}MyWidget::~MyWidget()
{delete ui;
}void MyWidget::on_pushButton_clicked()
{if(ui->Username->text() == "admin" && ui->Passwd->text() == "123456"){this->close();emit my_jump();}else{ui->Username->setText("账号或密码不正确!");ui->Passwd->clear();}
}void MyWidget::on_pushButton_2_clicked()
{this->close();
}void MyWidget::on_pushButton_3_clicked()
{emit my_signal_1();
}void MyWidget::on_pushButton_4_clicked()
{emit my_signal_2();
}//接收端头文件#ifndef SECOND_H
#define SECOND_H#include <QWidget>
#include <QMovie>namespace Ui {
class Second;
}class Second : public QWidget
{Q_OBJECTpublic:explicit Second(QWidget *parent = nullptr);~Second();public slots:void jump_slot();private:Ui::Second *ui;
};#endif // SECOND_H//接收端源文件#include "second.h"
#include "ui_second.h"Second::Second(QWidget *parent) :QWidget(parent),ui(new Ui::Second)
{ui->setupUi(this);
}Second::~Second()
{delete ui;
}void Second::jump_slot()
{QMovie *mv = new QMovie(":/e043-iquxrui6424394.gif");ui->label->setMovie(mv);mv->start();ui->label->setScaledContents(1);this->show();
}//主函数#include "mywidget.h"
#include "second.h"#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);MyWidget w;w.show();Second s;QObject::connect(&w,&MyWidget::my_jump,&s,&Second::jump_slot);return a.exec();
}