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 <QtGui/QApplication>  #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 <QMainWindow>  #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：