QT实现界面跳转切换

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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 <QWidget>class Two;namespace Ui {class One;}class One : public QWidget{    Q_OBJECTpublic:    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 <QWidget>namespace Ui {class Two;}class Two : public QWidget{    Q_OBJECTpublic:    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 <QWidget>namespace Ui {class Three;}class Three : public QWidget{    Q_OBJECTpublic:    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 <QWidget>class One;class Two;class Three;class QStackedLayout;class QVBoxLayout;class Widget : public QWidget{    Q_OBJECTpublic:    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 <QStackedLayout>#include <QPushButton>#include <QVBoxLayout>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 <QApplication>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

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