programin in the qt creator

[hamedazimi]

I wrote this code but the button signal and slot does not run
If you can help thank you that you are my answers.

#include "mainwindow.h"
#include <QTextEdit>
#include <QPushButton>
#include <QVBoxLayout>
#include <QString>
#include <QFileDialog>
#include <QDir>
#include <QComboBox>
 
 
MainWindow::MainWindow(QWidget *parent, Qt::WFlags flags)
    : QMainWindow(parent, flags)
 
  {
 
  ui.setupUi(this);
ui.pushButton->connect(ui.pushButton,SIGNAL(clicked()),ui.comboBox_3,SLOT(browse()));
}
void MainWindow:: browse()
{
 
 
    ui.comboBox_3->addItem((QDir::currentPath()));
   QString dire=QFileDialog::getExistingDirectory(this,tr("find file"),QDir::currentPath());
    if(!dire.isEmpty());
    ui.comboBox_3->addItem(dire);
    ui.comboBox_3->setCurrentIndex(ui.comboBox_3->currentIndex()+1);
}
 
 
 
MainWindow::~MainWindow()
{
 
 
}

#include "mainwindow.h"
#include <QTextEdit>
#include <QPushButton>
#include <QVBoxLayout>
#include <QString>
#include <QFileDialog>
#include <QDir>
#include <QComboBox>


MainWindow::MainWindow(QWidget *parent, Qt::WFlags flags)
    : QMainWindow(parent, flags)

  {

  ui.setupUi(this);
ui.pushButton->connect(ui.pushButton,SIGNAL(clicked()),ui.comboBox_3,SLOT(browse()));
}
void MainWindow:: browse()
{


    ui.comboBox_3->addItem((QDir::currentPath()));
   QString dire=QFileDialog::getExistingDirectory(this,tr("find file"),QDir::currentPath());
    if(!dire.isEmpty());
    ui.comboBox_3->addItem(dire);
    ui.comboBox_3->setCurrentIndex(ui.comboBox_3->currentIndex()+1);
}



MainWindow::~MainWindow()
{
 

}

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