Confuse of Signal and Slot

[Phong]

I wrote a simple function like this :

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    connect(ui->BrowseBtn,&QPushButton::clicked,this, &MainWindow::Browse);
    QDir mDir("D:/Document");
    qDebug() << mDir.entryList();

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::Browse(){
    ui->FileShow->setText("GG!");
    qDebug() << "GG";
}

and it works,
However I change connect to

 connect(ui->BrowseBtn,SIGNAL(QPushButton::clicked()),this, SLOT(MainWindow::Browse()));

it won't work!!! Can anyone tell me why??
What's the different??

[Jan-Willem]

Perhaps if you write it like this?

connect(ui->BrowseBtn, SIGNAL(clicked()), this, SLOT(Browse()));

[mrjj]

as @Jan-Willem writes you are not using the correct syntax

for the OLD syntax, you do not append the class type inside the SLOT() and SIGNAL()

http://doc.qt.io/qt-5/signalsandslots-syntaxes.html

[Phong]

@Jan-Willem @mrjj
OK, Thanks u guys, I know where the problem is now.