#ifndef WIDGET_H

#define WIDGET_H

#include <QWidget>

#include<QString>

class Widget : public QWidget

{

    Q_OBJECT

public:

    Widget(QWidget *parent = 0);

    ~Widget();

public slots:

    void openfiledialog();

    void savefiledialog();

private:

    QString _filename;

};

#endif // WIDGET_H

#include "widget.h"

#include<QPushButton>

#include<QHBoxLayout>

#include<QFileDialog>

#include<QDebug>

Widget::Widget(QWidget *parent)

    : QWidget(parent)

{

    QHBoxLayout *qh=new QHBoxLayout(this);

    QPushButton *qp1=new QPushButton("file");

    QPushButton *qp2=new QPushButton("file1");

    qh->addWidget(qp1);

    qh->addWidget(qp2);

    connect(qp1,SIGNAL(clicked()),this,SLOT(openfiledialog()));

     connect(qp2,SIGNAL(clicked()),this,SLOT(savefiledialog()));

}

Widget::~Widget()

{

}

void Widget::openfiledialog()

{

    QString filename=QFileDialog::getOpenFileName(this,"file",_filename);

    if(!filename.isEmpty())

    {

         _filename=filename;

         qDebug()<<"文件路径:"<<filename<<endl;

    }

}

void Widget::savefiledialog()

{

        QString filename=QFileDialog::getSaveFileName(this,"file",_filename);

        if(!filename.isEmpty())

        {

             _filename=filename;

             qDebug()<<"文件路径:"<<filename<<endl;

        }

}

#include "widget.h"

#include <QApplication>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    Widget w;

    w.show();

    return a.exec();

}