QT实现多窗口切换

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 Qt多窗口切换程序

1.ui文件中布局

 

2.主要程序

 main.cpp

#include   
#include "mainwindow.h"  
 
int main(int argc, char *argv[]) 
{ 
    QApplication a(argc, argv); 
    MainWindow w; 
    w.show(); 
     
    return a.exec(); 
} 

主界面程序：

mainwindow.h

ifndef MAINWINDOW_H 
#define MAINWINDOW_H  
 
#include   
#include "dialog1.h"  
#include "dialog2.h"  
 
namespace Ui { 
class MainWindow; 
} 
 
class MainWindow : public QMainWindow 
{ 
    Q_OBJECT 
     
public: 
    explicit MainWindow(QWidget *parent = 0); 
 
    ~MainWindow(); 
     
private slots: 
    void on_pushButton_clicked(); 
 
    void on_pushButton_2_clicked(); 
 
 
    void on_pushButton_3_clicked(); 
 
private: 
    Ui::MainWindow *ui; 
    Dialog1 dialog1; 
    Dialog2 dialog2; 
}; 
 
#endif // MAINWINDOW_H 

 

mainwindow.cpp

">#include "mainwindow.h" 
#include "ui_mainwindow.h"  
 
 
MainWindow::MainWindow(QWidget *parent) : 
    QMainWindow(parent), 
    ui(new Ui::MainWindow) 
{ 
    ui->setupUi(this); 
 
} 
 
MainWindow::~MainWindow() 
{ 
    delete ui; 
} 
 
void MainWindow::on_pushButton_clicked() 
{ 
    this->hide(); 
    dialog1.show(); 
    dialog1.exec(); 
    this->show(); 
 
} 
 
void MainWindow::on_pushButton_2_clicked() 
{ 
    this->close(); 
} 
 
 
 
void MainWindow::on_pushButton_3_clicked() 
{ 
    this->close(); 
    dialog2.show(); 
    dialog2.exec(); 
    this->show(); 
} 

dialog1.cpp

#include "dialog1.h"  
#include "ui_dialog1.h"  
 
Dialog1::Dialog1(QWidget *parent) : 
    QDialog(parent), 
    ui(new Ui::Dialog1) 
{ 
    ui->setupUi(this); 
} 
 
Dialog1::~Dialog1() 
{ 
    delete ui; 
} 
 
void Dialog1::on_pushButton_clicked() 
{ 
 
    this->close(); 
} 

dialog2.cpp与Dialog1相似

 

关键点：

this->close();
    dialog2.show();
    dialog2.exec();
    this->show();

通过等待dialog.exec()消息，判断主界面是否回显。

 运行结果：