QT实战——界面切换

需求：通过按钮进行对界面的切换（本次实现并未添加返回上一级界面按钮），如需要可以在对应界面进行添加按钮以及信号与槽

简单的界面设计

 当点击单机按钮切换至第一个widget，并打印1

 当点击联网按钮切换至第二个widget，并打印2

下面是代码部分

mywidget.h

#ifndef MYWIDGET_H
#define MYWIDGET_H

#include 
#include "wideget2.h"
#include "widget1.h"

namespace Ui {
class myWidget;
}

class myWidget : public QWidget
{
    Q_OBJECT

public:
    explicit myWidget(QWidget *parent = nullptr);
    ~myWidget();

public slots:
    void WidgetOpen();

private slots:
    void on_btn_D_clicked();

    void on_btn_L_clicked();

private:
    Ui::myWidget *ui;

    widget1 *FWidget;
    wideget2 *SWidget;

    void WidgetClose();



signals:
    void Widget1();
    void Widget2();



};

#endif // MYWIDGET_H

widget1.h

#ifndef WIDGET1_H
#define WIDGET1_H

#include 

namespace Ui {
class widget1;
}

class widget1 : public QWidget
{
    Q_OBJECT

public:
    explicit widget1(QWidget *parent = nullptr);
    ~widget1();

public slots:
    void widget1Open();

private slots:
    void on_btn_close1_clicked();

private:
    Ui::widget1 *ui;

    void widget1Close();

signals:
    void back();


};

#endif // WIDGET1_H

widget2.h

#ifndef WIDEGET2_H
#define WIDEGET2_H

#include 

namespace Ui {
class wideget2;
}

class wideget2 : public QWidget
{
    Q_OBJECT

public:
    explicit wideget2(QWidget *parent = nullptr);
    ~wideget2();

public slots:
    void widget2Open();

private slots:
    void on_btn_close2_clicked();

private:
    Ui::wideget2 *ui;

    void widget2Close();

signals:
    void back();
};

#endif // WIDEGET2_H

main.cpp

#include "mywidget.h"
#include 
#include "wideget2.h"
#include "widget1.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    myWidget w;
    w.show();
    widget1 FWidget;
    wideget2 SWidget;

    QObject::connect(&w,SIGNAL(Widget1()),&FWidget,SLOT(widget1Open()));
    QObject::connect(&w,SIGNAL(Widget2()),&SWidget,SLOT(widget2Open()));
    QObject::connect(&FWidget,SIGNAL(back()),&w,SLOT(WidgetOpen()));
    QObject::connect(&SWidget,SIGNAL(back()),&w,SLOT(WidgetOpen()));

    return a.exec();
}

mywidget.cpp

#include "mywidget.h"
#include "ui_mywidget.h"
#include 

myWidget::myWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::myWidget)
{
    ui->setupUi(this);

    /*********第一部分对主界面的设计*********/
    this->setMaximumSize(300,300);                      //最大尺寸
    this->setMinimumSize(300,300);                      //最小尺寸
    this->setWindowFlags(Qt::WindowCloseButtonHint);    //去掉最大化和最小化按钮，保留关闭按钮

}

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

void myWidget::WidgetOpen()
{
    this->show();
}

void myWidget::WidgetClose()
{
    this->close();
}

/*********第二部分对按钮进行定义*********/
void myWidget::on_btn_D_clicked()
{
    WidgetClose();
    //发送widget1界面出现信号
    qDebug()<<1;  
    emit Widget1();
}

void myWidget::on_btn_L_clicked()
{
    WidgetClose();
    //发送widget2界面出现信号
    qDebug()<<2;
    emit Widget2();
}

 widget1.cpp (如果后期需要添加返回按钮在widget1和widget2.cpp文件的ui界面添加即可）

#include "widget1.h"
#include "ui_widget1.h"
#include "mywidget.h"

widget1::widget1(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::widget1)
{
    ui->setupUi(this);
    /*********第一部分对主界面的设计*********/
    this->setMaximumSize(300,300);                      //最大尺寸
    this->setMinimumSize(300,300);                      //最小尺寸
    this->setWindowFlags(Qt::WindowCloseButtonHint);    //去掉最大化和最小化按钮，保留关闭按钮
}

widget1::~widget1()
{
    delete ui;
}

void widget1::on_btn_close1_clicked()
{
    this->hide();
    emit back();
    //发送返回上级界面的信号
}

void widget1::widget1Open()
{
    this->show();
}

void widget1::widget1Close()
{
    this->close();
}

 widget2.cpp

#include "wideget2.h"
#include "ui_wideget2.h"
#include "mywidget.h"

wideget2::wideget2(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::wideget2)
{
    ui->setupUi(this);

    /*********第一部分对主界面的设计*********/
    this->setMaximumSize(300,300);                      //最大尺寸
    this->setMinimumSize(300,300);                      //最小尺寸
    this->setWindowFlags(Qt::WindowCloseButtonHint);    //去掉最大化和最小化按钮，保留关闭按钮
}

wideget2::~wideget2()
{
    delete ui;
}

void wideget2::on_btn_close2_clicked()
{
//    widget2Close();
    this->hide();
    //发送返回上层界面的信号
    emit back();
}

void wideget2::widget2Open()
{
    this->show();
}

void wideget2::widget2Close()
{
    this->close();
}