Qt之多界面切换编程

喜欢ヅ旅行 2022-10-25 14:29 216阅读 0赞

在Qt编程中经常遇到多个界面之间的切换， 比如从登录界面跳转到主界面， 主界面跳转到设置界面，在返回到主界面

下面更加这个流程实现一个例子：  
主界面：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70]  
添加第二个界面  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 2]

#include "dialog.h"
    #include "ui_dialog.h"
    #include "mainwindow.h"
    Dialog::Dialog(QWidget *parent) :
        QDialog(parent),
        ui(new Ui::Dialog)
    { 
        ui->setupUi(this);
    }
    
    Dialog::~Dialog()
    { 
        delete ui;
    }
    
    void Dialog::on_pushButton_clicked()
    { 
      MainWindow *gui1 = new MainWindow ;
      gui1->show();
     this->hide();
    }

#include "mainwindow.h"
    #include "dialog.h"
    #include <QApplication>
    
    int main(int argc, char *argv[])
    { 
        QApplication a(argc, argv);
      // MainWindow w;
        Dialog  w1;
     // w.show();
        w1.show();
      // delete this;//把主界面删除
        return a.exec();
    }

#include "mainwindow.h"
    #include "ui_mainwindow.h"
    #include "dialog.h"
    
    MainWindow::MainWindow(QWidget *parent)
        : QMainWindow(parent)
        , ui(new Ui::MainWindow)
    { 
        ui->setupUi(this);
    }
    
    MainWindow::~MainWindow()
    { 
        delete ui;
    }
    
    
    void MainWindow::on_pushButton_clicked()
    { 
        Dialog *gui2 = new Dialog ;
        gui2->show();
       this->hide();
      // this->close();//这里不能用delete，因为this是main函数中创建的栈空间系统自动释放
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 3]

按下按键后  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 4]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 1]: /images/20221024/ad565c7c5d0249758d28a7bc5b6bf1c1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 2]: /images/20221024/7a0b3200cecf41d4bc8cb81a3c717a7a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 3]: /images/20221024/0b0f2fa84523420bbc3fe33aa6686999.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTMyODQwNg_size_16_color_FFFFFF_t_70 4]: /images/20221024/e5b812b7b5844b32b617839e3bc7832c.png