qt打开文件对话框

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include<QMenu>

#include<QToolBar>

#include<QFileDialog>

#include<QMessageBox>

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{
  
  

    //ui->setupUi(this);

    openAction =new QAction(tr("&打开"),this);

    openAction->setShortcut(QKeySequence::Open);

    openAction->setStatusTip(tr("Open a file."));

    openAction->setIcon(QIcon(":/a.png"));

    QMenu *menu= menuBar()->addMenu(tr("&文件"));

    menu->addAction(openAction);

    QToolBar *tool = addToolBar(tr("&文件"));

    tool->addAction(openAction);

    lable = new QLabel;

    statusBar()->addAction(openAction);

    connect(openAction,SIGNAL(triggered()),this,SLOT(open()));

}

//打开文件函数

void MainWindow::open()

{
  
  

    QString path = QFileDialog::getOpenFileName(this, tr("Open Image"), ".", tr("Image Files(*.jpg *.png)"));

    if(path.length() == 0) {
  
  

            QMessageBox::information(NULL, tr("Path"), tr("You didn't select any files."));

    } else {
  
  

            QMessageBox::information(NULL, tr("Path"), tr("You selected ") + path);

    }

}

MainWindow::~MainWindow()

{
  
  

    delete ui;

}