QwidgetStack 问题------多个页面 [复制链接]

我的应用程序是两个页面，第一页面有pushButton1,按下后显示第二个页面，用QwidgetStack 来实现，但在raiseWidget(1)时出错，请问为什莫？


以下是我的源程序

#ifndef FORM1_H
#define FORM1_H

#include <qvariant.h>
#include <qdialog.h>

class QVBoxLayout;
class QHBoxLayout;
class QGridLayout;
class QLabel;
class QPushButton;
class QWidget;
class QWidgetStack;

class Form1 : public QDialog
{
    Q_OBJECT

public:
    Form1( QWidget* parent = 0, const char* name = 0, bool modal = FALSE, WFlags fl = 0 );
    ~Form1();

    QWidgetStack* widgetStack1;
    QWidget* page;
    QPushButton* pushButton1;
    QWidget* page_2;
    QPushButton* pushButton2;
    QPushButton* pushButton2_8;
    QPushButton* pushButton2_7;
    QPushButton* pushButton2_6;
    QPushButton* pushButton2_5;
    QPushButton* pushButton2_4;
    QPushButton* pushButton2_3;
    QPushButton* pushButton10;
    QLabel* pixmapLabel1;
//    connect( pushButton1, SIGNAL( clicked() ), widgetStack1, SLOT( raiseWidget( 1 ) ) );
//显示第二页
public slots:
    void next();



protected:

protected slots:
    virtual void languageChange();
};

#endif // FORM1_H

#include "form1.h"

#include <qvariant.h>
#include <qlabel.h>
#include <qpushbutton.h>
#include <qwidget.h>
#include <qwidgetstack.h>
#include <qlayout.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qimage.h>
#include <qpixmap.h>

/*
*  Constructs a Form1 as a child of 'parent', with the
*  name 'name' and widget flags set to 'f'.
*
*  The dialog will by default be modeless, unless you set 'modal' to
*  TRUE to construct a modal dialog.
*/
Form1::Form1( QWidget* parent, const char* name, bool modal, WFlags fl )
    : QDialog( parent, name, modal, fl )

{
    if ( !name )
    setName( "Form1" );

    widgetStack1 = new QWidgetStack( this, "widgetStack1" );
    widgetStack1->setGeometry( QRect( 0, 0, 600, 470 ) );
//页面一
    page = new QWidget( widgetStack1, "page" );

    pushButton1 = new QPushButton( page, "pushButton1" );
    pushButton1->setGeometry( QRect( 90, 110, 421, 181 ) );
   
    widgetStack1->addWidget( page, 0 );
//页面二
    page_2 = new QWidget( widgetStack1, "page_2" );

    pushButton2 = new QPushButton( page_2, "pushButton2" );
    pushButton2->setGeometry( QRect( 50, 50, 81, 31 ) );

    pushButton2_8 = new QPushButton( page_2, "pushButton2_8" );
    pushButton2_8->setGeometry( QRect( 180, 50, 81, 31 ) );

    pushButton2_7 = new QPushButton( page_2, "pushButton2_7" );
    pushButton2_7->setGeometry( QRect( 310, 50, 81, 31 ) );

    pushButton2_6 = new QPushButton( page_2, "pushButton2_6" );
    pushButton2_6->setGeometry( QRect( 430, 50, 81, 31 ) );

    pushButton2_5 = new QPushButton( page_2, "pushButton2_5" );
    pushButton2_5->setGeometry( QRect( 90, 140, 81, 31 ) );

    pushButton2_4 = new QPushButton( page_2, "pushButton2_4" );
    pushButton2_4->setGeometry( QRect( 240, 140, 81, 31 ) );

    pushButton2_3 = new QPushButton( page_2, "pushButton2_3" );
    pushButton2_3->setGeometry( QRect( 380, 140, 81, 31 ) );

    pushButton10 = new QPushButton( page_2, "pushButton10" );
    pushButton10->setGeometry( QRect( 40, 380, 141, 41 ) );

    pixmapLabel1 = new QLabel( page_2, "pixmapLabel1" );
    pixmapLabel1->setGeometry( QRect( 400, 360, 131, 41 ) );
    pixmapLabel1->setPixmap( QPixmap::fromMimeSource( "logo.png" ) );
    pixmapLabel1->setScaledContents( TRUE );
    widgetStack1->addWidget( page_2, 1 );
   
    connect( pushButton1, SIGNAL( clicked() ), widgetStack1, SLOT( raiseWidget( 1 ) ) );
    languageChange();
    resize( QSize(602, 480).expandedTo(minimumSizeHint()) );
}

/*
*  Destroys the object and frees any allocated resources
*/
Form1::~Form1()
{
    // no need to delete child widgets, Qt does it all for us
}

/*
*  Sets the strings of the subwidgets using the current
*  language.
*/
void Form1::languageChange()
{
    setCaption( tr( "Form1" ) );
    pushButton1->setText( tr( "MULTIROOM SYSTEM\n"
"PUSH TO START" ) );
    pushButton2->setText( tr( "SOURCE1" ) );
    pushButton2_8->setText( tr( "SOURCE2" ) );
    pushButton2_7->setText( tr( "SOURCE3" ) );
    pushButton2_6->setText( tr( "SOURCE4" ) );
    pushButton2_5->setText( tr( "SOURCE5" ) );
    pushButton2_4->setText( tr( "SOURCE6" ) );
    pushButton2_3->setText( tr( "SOURCE7" ) );
    pushButton10->setText( tr( "INSTALLER" ) );
}
//这里使用raiseWidget
void Form1::next()
{
widgetStack1 -> raiseWidget( 1 );
}

#include <qapplication.h>
#include "form1.h"

int main( int argc, char ** argv )
{
    QApplication a( argc, argv );
    Form1 w;
    w.show();
    a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
    return a.exec();
}