Qt页面切换自制Demo

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QtCore/QCoreApplication> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; } void MainWindow::setOrientation(ScreenOrientation orientation) { #if defined(Q_OS_SYMBIAN) // If the version of Qt on the device is < 4.7.2, that attribute won't work if (orientation != ScreenOrientationAuto) { const QStringList v = QString::fromAscii(qVersion()).split(QLatin1Char('.')); if (v.count() == 3 && (v.at(0).toInt() << 16 | v.at(1).toInt() << 8 | v.at(2).toInt()) < 0x040702) { qWarning("Screen orientation locking only supported with Qt 4.7.2 and above"); return; } } #endif // Q_OS_SYMBIAN Qt::WidgetAttribute attribute; switch (orientation) { #if QT_VERSION < 0x040702 // Qt < 4.7.2 does not yet have the Qt::WA_*Orientation attributes case ScreenOrientationLockPortrait: attribute = static_cast<Qt::WidgetAttribute>(128); break; case ScreenOrientationLockLandscape: attribute = static_cast<Qt::WidgetAttribute>(129); break; default: case ScreenOrientationAuto: attribute = static_cast<Qt::WidgetAttribute>(130); break; #else // QT_VERSION < 0x040702 case ScreenOrientationLockPortrait: attribute = Qt::WA_LockPortraitOrientation; break; case ScreenOrientationLockLandscape: attribute = Qt::WA_LockLandscapeOrientation; break; default: case ScreenOrientationAuto: attribute = Qt::WA_AutoOrientation; break; #endif // QT_VERSION < 0x040702 }; setAttribute(attribute, true); } void MainWindow::showExpanded() { #if defined(Q_OS_SYMBIAN) || defined(Q_WS_SIMULATOR) showFullScreen(); #elif defined(Q_WS_MAEMO_5) showMaximized(); #else show(); #endif } #include "page1.h" void MainWindow::on_pushButton_Go1_clicked() { //这里的Page是个QMainWindow Page1 *page1=new Page1(); page1->show(); QApplication::exec(); } #include "form1.h" void MainWindow::on_pushButton_Go3_clicked() { //这里的form是QWidget Form1 *form1=new Form1(); form1->showFullScreen(); QApplication::exec(); } #include "dialog1.h" void MainWindow::on_pushButton_Go4_clicked() { //这里的dialog是QDialog Dialog1 myDlg; myDlg.exec();//这里可以有返回值~我知道 }