QT实现界面跳转切换

简介

    Qt图形应用中经常会遇到从一个界面跳转到另一个界面应用，这里简单介绍一种使用信号-槽机制实现的界面跳转方案。创建one，two， three三个图像界面类，每一个界面类中实现一个信号函数，在按钮的槽函数中发送该信号， 使用QStackedLayout存放所有的界面，在主窗口使用connect将信号和QStackedLayout::setCurrentIndex关联起来。

界面one

    界面one图形如下：

one.h

#ifndef ONE_H
#define ONE_H

#include 

class Two;

namespace Ui {
class One;
}

class One : public QWidget
{
    Q_OBJECT

public:
    explicit One(QWidget *parent = 0);
    ~One();

signals:
    void display(int number);

private slots:
    void on_nextPushButton_clicked();

private:
    Ui::One *ui;
    Two *two;
};

#endif // ONE_H

one.cpp

  

#include "one.h"
#include "ui_one.h"
#include "two.h"
#include "widget.h"

One::One(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::One)
{
    ui->setupUi(this);

}

One::~One()
{
    delete ui;
}

void One::on_nextPushButton_clicked()
{
    emit display(1);
}

界面two

    界面two图形如下：

two.h

#ifndef TWO_H
#define TWO_H

#include 

namespace Ui {
class Two;
}

class Two : public QWidget
{
    Q_OBJECT

public:
    explicit Two(QWidget *parent = 0);
    ~Two();

signals:
    void display(int number);


private slots:
    void on_previousPushButton_clicked();

    void on_nextPushButton_clicked();

private:
    Ui::Two *ui;
};

#endif // TWO_H

two.cpp

#include "two.h"
#include "ui_two.h"

Two::Two(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Two)
{
    ui->setupUi(this);
}

Two::~Two()
{
    delete ui;
}

void Two::on_previousPushButton_clicked()
{
    emit display(0);
}

void Two::on_nextPushButton_clicked()
{
    emit display(2);
}

界面three

    界面three图形如下：

three.h

#ifndef THREE_H
#define THREE_H

#include 

namespace Ui {
class Three;
}

class Three : public QWidget
{
    Q_OBJECT

public:
    explicit Three(QWidget *parent = 0);
    ~Three();

signals:
    void display(int number);

private slots:
    void on_previousPushButton_clicked();

private:
    Ui::Three *ui;
};

#endif // THREE_H

three.cpp

#include "three.h"
#include "ui_three.h"

Three::Three(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Three)
{
    ui->setupUi(this);
}

Three::~Three()
{
    delete ui;
}

void Three::on_previousPushButton_clicked()
{
    emit display(1);
}

主界面

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include 

class One;
class Two;
class Three;
class QStackedLayout;
class QVBoxLayout;

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();

private:
    One *one;
    Two *two;
    Three *three;
    QStackedLayout *stackLayout;
    QVBoxLayout *mainLayout;
};

#endif // WIDGET_H

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include "one.h"
#include "two.h"
#include "three.h"
#include 
#include 
#include 

Widget::Widget(QWidget *parent) :
    QWidget(parent)
{
    setFixedSize(400, 300);
    one = new One;
    two = new Two;
    three = new Three;
    stackLayout = new QStackedLayout;
    stackLayout->addWidget(one);
    stackLayout->addWidget(two); 
    stackLayout->addWidget(three);
    connect(one, &One::display, stackLayout, &QStackedLayout::setCurrentIndex);             // 0
    connect(two, &Two::display, stackLayout, &QStackedLayout::setCurrentIndex);             // 1
    connect(three, &Three::display, stackLayout, &QStackedLayout::setCurrentIndex);       // 2

    mainLayout = new QVBoxLayout;
    mainLayout->addLayout(stackLayout);
    setLayout(mainLayout);

}

Widget::~Widget()
{
}

main.cpp

#include "widget.h"
#include 

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    return a.exec();
}

注：源代码下载地址http://download.csdn.net/detail/tj807126663/7540203