Qt之QFileDialog

widget.h:

#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

widget.cpp:

#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;
        }
}

main.cpp:

#include "widget.h"
#include <QApplication>

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

    return a.exec();
}

效果: